Research Guidance:

Ph. Ds Awarded   :  18 + 02 Submitted Thesis 

Ph.Ds Ongoing    :  10

Ongoing/Completed Post-Doctoral Fellows: 03 (Two UGC Dr. D.S. Kothari fellowships and one CSIR-Research Associate)

M.Phils Awarded: 04

M.Tech dessertations guided : 06

M.Sc dessertations guided     : 07

Courses taught so far:

At under Graduate Level:

1. Engineering Physics
2. Electrical and Electronic Engineering Materials
3. Physics-I
4. Physics-II
5. Semiconductor Devices
6. Space and Atmospheric Science-I
7. Space and Atmospheric Sciences-II

​At Post Graduate Level:

1. Nano Materials Synthesis and Characterization

​Guest Lecturers/Invited talks and Panel Member:

• Delivering Guest lecturers in various Technical institutes and colleges.
• Delivering Invited talks in various Institutes/Universities. 
• Acting as a selection committee panel member for appointing Assistant Professors/Associate Professors/Professors in various technical institutes/colleges/Universities.

Academic/Post-doctoral / Research Experiences:

• July 2015 - to till date          Professor, Department of Applied Physics, Delhi Technological University, Delhi
• July 2012 - July 2015           Associate Professor, Department of Applied Physics, Delhi Technological University, Delhi
• Sep 2008 - July 2012            Professor & HOD, Department of Physics, K L University, Vijayawada, Andhra Pradesh.
• Aug 2007 - Aug 2008           Associate Professor, Department of Physics, K L University, Vijayawada, Andhra Pradesh.
• Nov 2006 - Aug 2007           Senior Lecture, Department of Physics, K L University, Vijayawada, Andhra Pradesh.              
• Jan 1998 - Nov 2006            Lecture, Department of Physics, K L University, Vijayawada, Andhra Pradesh.  
• Jan 1997 - Jan 1998            Research Scientist, Indian Space Research Organization (ISRO), Govt. of India. 
• Jan 1995 - Jan 1997            Research Associate, CSIR, Govt. of India.   
• Jan 1992 - Dec 1994            Senior Research Fellow, CSIR, Govt. of India.

​Institute/Department Level responsibilities/Recognitions:

Departmental Level:

• Practical examination superintendent for Applied Physics Department since 2012 to till date;
• Scrutiny-cum Screening committee member for the appointment of Assistant Professors in Physics;
• Ph.D. coordinator;
• Coordinator for B. Tech. evening courses;
• Coordinator for B. Tech. (EP)
• curriculum revision committee 2015;
• Member, department purchase committee;
• Organizing member for seminars/works shops at department level;
• Coordinator for BOS and DRC meetings;
• Student Research Committee (SRC) member.
• Department Research Committee (DRC) Chairman

Institutional Level:

• Chairman, Sports Council since Dec 2014 to 2017
• Member, cultural council for the year 2013-14
• Member, sports council for the year 2013-14
• Member, discipline committee
• Chairman, purchase committee for sports
• Member, central purchase committee, DTU
• Scrutiny-cum Screening committee member for the appointment of Assistant Professors for various branches in DTU
• Member, Scrutiny cum Screening committee for the appointment of Assistant Professors of various branches in DTU
• Member, Scrutiny cum Screening committee for the appointment of Associate Professors for various branches in DTU
• Member, presentation committee for the appointment of Associate & Assistant Professor posts in various branches in DTU

Awards, Honors and other Academic Achievements:

• Listed as one among the top 2% scientists in the world thrice by Stanford University, USA in year 2021, 2022 & 2023.
• K L University awarded me with Best teacher award thrice for the academic years 2008-09, 2009-10 and 2010-11.
• DTU awarded me with “Commendable Researcher” award SIX times consecutively from 2016-17 to 2021-2022 academic years.
• Established “Advanced Materials Research Laboratory” in K L University, Vijayawada.
• Established “Materials & Atmospheric Science Research Laboratory” in DTU, Delhi.
• Establishing “Atmospheric Research Centre” in DTU, Delhi.
• Research Scientist award by ISRO, Bangalore.
• Research Associate award by CSIR, Govt. of Indian, New Delhi.
• Senior Research Fellow award by CSIR, Govt. of India, New Delhi.
• HOD and BOS chairman for Department of Physics, K L University, Vijayawada, A. P. during 2009 to 2012.
• Associate Dean (Student Welfare), K L University, during 2006-2008
• Associate Dean (Students Discipline), K L University, during 2008-2011.
• BOS member for Physics department in Maharshi Dayanand University, Rohtak, Haryana.
• BOS member for Physics department in KL University, Vijayawada, A.P
• BOS member for Physics department in Vignan University, Guntur, A.P.
• BOS member for Physics department in SGT University, Gurugram, Delhi.
• BOS member for Physics department in CRS University, Jind, Haryana. 
• BOS member for Physics department in Adisankara College of Engineering, Guduru, A.P. 
• BOS member for Physics department in NSRIT College of Engineering, Visakapatnam, A.P. 
• Acting as a Reviewer for many International Journals of high repute.
• Acting as a Reviewer for Research Projects submitted to DST, UGC and CSIR.
• Acting as a Ph.D. thesis adjudicator for many Indian Universities/ Research Organizations.
• Acting as a Paper Setter for many Indian Universities.
• Acted as Subject Expert member for recruiting faculty in NITs (Hamirpur), State Universities (M.S. University, Vadodara) and Deemed Universities (KLU, Vignan etc.).
• Acted as Chairman for recruitment committee for basic Science subjects in K L University, Vijayawada, Andhra Pradesh.
• Acted as a scrutiny committee member for the recruitment of faculty in DTU
• Acted as a presentation committee member for the recruitment of faculty in DTU.
• Acting as a Lead Guest Editor for International Journals.
• Presently working as HOD and BOS chairman for Applied Physics Department, DTU. 

​Membership in Professional Scientific Societies:

• Life member - National Environmental Science Academy (NESA)
• Life member - Luminescence Society of India (LSI)
• Life member - Materials Research Society of India (MRSI)

Research Interests in Detailed:

Materials Science:

Rare Earth (RE) doped phosphors for white light emitting diodes (w-LEDs):

In last few decades research is being conducted on the luminescent material (phosphors, quantum dots, glasses, etc) doped with RE ions. Phosphors doped with RE ions have attracted numerous researchers due to its wide range of applications in solid state lighting applications. In Materials Science and Atmospheric Science Research Lab (MASRL), we are working on such materials for their application in w-LEDs. There are different hosts that are explored for its utilization in lighting devices.

RE ions doped nanophosphors for bio-photonic applications such as Bio-Imaging and Target Drug delivery:

Nano sized RE doped powder phosphors are quite suitable for their application in bio-medical field. Smaller sized particles offer easy delivery of biochemicals and greater luminescent characteristics that facilitates high signal to noise ratio. Therefore, up-conversion nanoparticles offer high contrast as imaging probes and therefore found applications in bio-photonic devices.

Phosphors doped with RE/transition metal (TM) ions for solar spectral modification and therby to enhance efficiency of solar cells:

Phosphors doped with RE ions with emission around 1μm are of great importance for their application in solar cells, lasers and bio-imaging. These materials not only improve its characteristic properties but also enhance thermal stability. phosphor materials with broad absorption in n-UV or blue and thereby conversion in NIR region is required which overlap the solar spectral profile. This helps in solar spectral modifications.

Glasses doped with RE/TM ions for Photonic Applications such as Lasers, Optical Fiber Amplifiers and White LEDs:

RE incorporated glasses synthesized using melt quench technique have applications in laser devices, optical fibre and white light emitting devices. They offer an advantage over RE doped phosphors that it does not require any encapsulating polymer material for its utilization in different applications. Thus, glasses are quite suitable for optoelectronic devices.

Green synthesis of nanocarbon dots for Bio-imaging and Target Drug delivery applications:

In this, bio-waste which have sufficient amount of C-atom like fruit peels, Gooseberry, food waste, Plant leaves, beverages etc are used as raw materials to produce carbon quantum dots for bio-imaging and drug delivery applications. Depending upon their chemical composition, these quantum dots have the capability to display its versatile nature by emitting tunable light. In-order to improvise its utility various heteroatoms like nitrogen, sulphur, phosphorous has been used as dopant.

Atmospheric Science:

The major areas of research under this portion of my lab are:

1. Study of trace gases in the atmosphere.
2. Particulate matter studies, primarily focussing on PM 2.5. However, under this part not only do we study it in the context of research but this portion along with aerosols is also covered in the theory subject for the students.
3. A detailed study on solar cycle and the temperature changes occurring due to it in the troposphere is a major part of the ongoing work.
4. My lab has a black carbon measuring instrument named AETHALOMETER which gives us an insight about the presence of black carbon in the atmosphere. I plan to extend the study of black carbon by mixing its relationship with other atmospheric dynamical parameters.
5. For the past two years, we have been conducting labs for the students too in which we make use of simulators available online to study various atmospheric circulations such as the secondary circulations including tropical cyclones and many more.

Today, the major threat to humankind is Climate Change as per COP-26. And, as correctly pointed by UN, the decade 2021-2030 is the decade of climate change studies which aims to reduce the carbon footprint, increase carbon sinks etc. All this can be achieved if we start the study and research at the basic level. And, by giving the students both theoretical and practical aspects. MASR lab is planing to contribute positively towards the research in atmosphere dynamics.

Ongoing/Completed Research Projects:

Sponsored Research Projects: (1992 to till date: ~ 3.0 Cr.)

Completed Sponsored Research Projects: 2.7 Cr

Ongoing Sponsored Research Projects: 30 Lakhs

Details of Research Publications (From 2013 onwards in DTU)

Total number of publications in DTU: 195 + (International Peer Reviewed and Scopus Indexed Journals)

Total Number of papers presented/published in conferences & conference proceedings: 160 +

Google Scholar Link: https://scholar.google.com/citations?user=xaa8DosAAAAJ&hl=en

Recent Publications details:

2024 (10 Publications)

• Sheetal Kumari, A. S. Rao, R.K. Sinha, Investigations on Photoluminescence and energy transfer studies of Sm³⁺ and Eu³⁺ ions doped Sr₉Y₂W₄O₂₄ red emitting phosphors with high color purity for w-LEDs. Journal of Molecular Structure 1295 (2024) 136507 (Impact Factor-3.80).
• Sumandeep Kaur, Harpreet Kaur, A. S. Rao, UV and blue excited tunable emission of thermally stable Bi³⁺ sensitized Eu³⁺ doped Calcium Aluminozincate Phosphor for Photonic applications. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 305 (2024) 123524 (Impact Factor-4.40).

2023 (34 Publications)

• Anu, A.S. Rao, Novel Orange-Red emitting Li2Ba5(WO5)3:Eu3+ Phosphor for w-LEDs and non-contact theromometry applicationa. Journal of Materials Science: Materials in Electronics,   (2023) (Accepted) (Impact Factor-2.779).
• Anu, A.S. Rao, Luminescence and Optical thermometry strategy based on emission spectra of Li₂Ba₅W₃O₁₅:Pr³⁺ phosphors. Optical Materials,  145 (2023) 114476 (Impact Factor-3.754).
• Sandeep Sharma, Sumandeep Kaur, A.S. Rao, Kamal Kishor, Thermally stable illuminating characteristics of Tb³⁺/Sm³⁺ ions activated BaO-SrO-Al₂O₃-B₂O₃-SiO₂ glasses for Photonic applications. Optical Materials,  145 (2023) 114446 (Impact Factor-3.754).
• Anu, A.S. Rao, Synthesis, Structural and Fluorescence investigations of novel Li₂Ba₅W₃O₁₅:Sm³⁺ phosphors for Photonic device applications. Journal of Fluorescence, (2023) (Accepted) (Impact Factor-2.525).
• Shristy Malik, A.S. Rao, S.K. Dhaka, PM2.5 observations of outdoor and indoor environment at Dwarka, New Delhi, India. Mapan, (2023) (Accepted) (Impact Factor-1.446).
• Chetna, S.K. Dhaka, G. Longiany, V. Panwar, V. Kumar, Shristy Malik, A.S. Rao,  Trends and Variability of PM2.5 at different time scales over Delhi: Long-term analysis 2007-2021. Aerosol and Air Quality Research 23 (5) (2023) 220191 (Impact Factor-4.530).
• Karthika Maheshwari, Aman Prasad, Ravita, Sk. Mahamuda, Yasha Tayal, A.S. Rao, Thermally stable multi-colour emitting Dy³⁺/Eu³⁺ co-doped BaO-ZnO-Li₂O-P₂O₅ glasses for w-LEDs. Journal of Materials Science:Materials in Electronics,  34 (2023) 2059 (Impact Factor-2.779).
• Vijay Singh, Ch.B. Annapurna Devi, A.S. Rao, Ji Bong Joo, Ultraviolet-B radiation from  Gd (III) doped hardystonite. International Journal of Materials Research (2023) (Accepted) (Impact Factor-0.678). 
• Ravita,  Aman Prasad, Pooja Rohilla, Rajat Bajaj, Anu, Rajesh Punia,  Allam Srinivasa Rao, Luminescence studies on Dy³⁺ doped Calcium Aluminium Borosilicate (CABS) glasses for White Light Emittion and Applications in W-LEDs. Journal of Fluorescence, (2023) (Accepted) (Impact Factor-2.525).
• Pooja Rohilla, Aman Prasad, A.S. Rao, Structural and Luminescence studies of Bi³⁺ activated Ba₃MoTiO₈ Phosphors for near UV pumped w-LED Applications. International Journal of Applied Ceramic Technology, (2023) (Accepted) (Impact Factor-2.328).
• A. Kumar, V. Kumar, N. Deopa, R. Punia, A. S. Rao, Epoxy free LED devices: Physical and optical examination of Praseodymium doped borate glasses for enhanced performance. Materials Letters: X, 19 (2023) 100210 (Impact Factor-1.78).
• Sheetal Kumari, A. S. Rao, R.K. Sinha, Structural and Photoluminescence properties of Sm³⁺ ions doped Strontium Yttrium Tungstate Phosphors for Reddish-Orange Photonic device Applications. Materials Research Bulletin, 167 (2023) 112419 (Impact Factor-5.60).
• Pooja Rohilla, A.S. Rao, Energy transfer induced color tunable Photoluminescence performance of thermally stable Sm³⁺/Eu³⁺ co-doped Ba₃MoTiO₈ Phosphors for white LED Applications. Journal of Materials Science: Materials in Electronics, 34 (2023) 1662 (Impact Factor-2.779).
• Vibha Sharma, Shreya Maurya, Anu, Aman Prasad, A.S. Rao, Structural, Optical and Luminescence properties of Dy³⁺ activated Potassium Calcium Silicate Phosphors for white light-emitting diodes. Luminescence, 38 (2023) 1607-1617 (Impact Factor-2.613).
• Yasha Tayal, Rupesh K. Talewar, Sk. Mahamuda, Aman Prasad, Kartika Maheshwari, Mohit Kumar, A.S. Rao, Spectral characterization and energy transfer study of Nd³⁺/Yb³⁺ in Borosilicate Glasses. Optical Materials, 142 (2023) 114049 (Impact Factor-3.754).
• Anu, Amit Kumar, Ravina, Nisha Deopa, A.S. Rao, Efficient tunable Photoluminescence of Dy³⁺/Eu³⁺ co-doped OFSZBS glasses for warm white LEDs. Journal of Non-Crystalline Solids, 616 (2023) 122421 (Impact Factor-4.458).
• Kartika Maheshwari, Ravita, A. Prasad, Yasha Tayal, A.S. Rao, Spectroscopic Studies of Pr³⁺ doped red-emitting BaO-ZnO-Li₂O-P₂O₅ glasses for Luminescent device Applications. Optical Materials, 140 (2023) 113910 (Impact Factor-3.754).
• Manjeet, A. Kumar, Anu, Ravina Lohan, Nisha Deopa, Anand Kumar, R.P. Chahal, S. Dahiya, R. Punia, A.S. Rao, Impact of Sm³⁺ ions on structural, thermal, optical and photoluminescence properties of ZnO–Na₂O–PbO–B₂O₃ glasses for optoelectronics device applications. Optical Materials, 139 (2023) 113778 (Impact Factor-3.754).
• Sumandeep Kaur, Videsh Kumar, A.S. Rao, Deep Red emission from Rare Earth free Calcium Aluminozincate Phosphor with the substitution of Cr³⁺ ion. RSC Advances, 13 (2023) 16663-16670 (Impact Factor-4.038).
• Kanishk Poria, Ravina Lohan, Sanjana Bhatia, Amit Kumar, Rajwinder Singh, Nisha Deopa, Rajesh Puniac, Jangvir Singh Shahi, A.S. Rao, Lumino-structural properties of Dy³⁺ activated Na₃Ba₂LaNb₁₀O₃₀ phosphors with enhanced internal quantum yield for w-LEDs. RSC Advances, 13 (2023) 11557-11568 (Impact Factor-4.038).
• Sheetal Kumari, Anu, Aman Prasad, Pooja Rohilla, A. S. Rao, Prospective applications of thermally stable Dy³⁺ doped potassium zinc strontium borate (KZSB) glasses in w-LEDs. Journal of Materials Science: Materials in Electronics, 34 (2023) 907 (1-17) (Impact Factor-2.779).
• C. Sumalatha, Ramachari Doddoji, M. Venkateswarlu, K. Swapna, Sk Mahamuda, A.S. Rao, Luminescence and photometric activity of an intense green emitting ZnBiBaBFTe:Tb³⁺ glasses. Radiation Physics and Chemistry, 208 (2023) 110894 (Impact Factor-2.776).
• A.V.S. Yeswanth, Ib Singh Deo, Anu, A.S. Rao, G. Vijaya Prakash, Down-conversion and up-conversion photoluminescence studies of Er³⁺ doped calcium zinc borosilicate glass for optical fiber amplifiers. Journal of  Non-Cryst. Solids, 609 (2023) 122280 (Impact Factor-4.458).
• Ravina Lohan, A. Kumar, Mukesh K. Sahu, Anu Mor, V. Kumar, Nisha Deopa, A.S. Rao, Structural, thermal, and luminescence kinetics of Sr₄Nb₂O₉ phosphor doped with Dy³⁺ ions for cool w-LED applications. Journal of Materials Science: Materials in Electronics, 34 (2023) 694 (Impact Factor-2.220).
• Rupesh A. Talewara, Sk. Mahamuda, A.S. Rao, S.V. Moharild, Novel Mn⁴⁺-activated NaLiTi₃O₇ far-red emitting phosphors. Journal of Luminescence, 2515 (2023) 119591 (Impact Factor-4.171).
•  Vijay Singh, Jung-Kul Lee, Aman Prasad, A.S. Rao, Photoluminescence and defect centers in near violet emitting Pb²⁺ doped CaYAl₃O₇ phosphors obtained by urea-nitrate auto combustion synthesis. Ceramics International, 49 (2023) 3076–3082 (Impact Factor-5.532).
• Kartika Maheshwari, A.S. Rao, Down-shifting photoluminescent properties of Tb³⁺ doped phosphate glasses for intense green-emitting devices applications. Optical Materials, 137 (2023) 113533 (Impact Factor-3.754).
• Vijay Singh,  Ch. B. Annapurna Devi,  B. Rupa Venkateswara Rao,  A. S. Rao, Green Emission from Calcium Zirconium Silicate Doped with Trivalent Terbium Phosphor. Journal of Electronic Materials, 52 (2023) 50–59 (Impact Factor-2.047).
• Ravita, Aman Prasad, Pooja Rohilla, Ankur Shandilya, A.S. Rao, Photoluminescence and energy transfer studies on Tm³⁺/Dy³⁺/Eu³⁺ doped borosilicate glasses for color tunability and warm white light generation. Journal of Non-Crystalline Solids, 606 (2023) 122192 (Impact Factor-4.468).
• Rajat Bajaj, Pooja Rohilla, Aman Prasad, Ravita, Ankur Shandilya, A.S. Rao, Thermally stable Sm³⁺-doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w-LED applications. Luminescence, 38 (2023) 428-436 (Impact Factor-2.613).

Number of Publications in DTU year wise: