Publications

My publications span a range of topics from"Fab-to-Farm" aspects of Silicon solar farms. See Google Scholar Page

PhD Thesis, Process-to-Module Modeling and Multiprobe Characterization of Silicon Heterojunction PV, (Progress in Photovoltaics, Cover Image, Volume 26, Issue 4)

Journal Articles

1. X. Sun, R. V. K. Chavali, and M. A. Alam, "Real‐time monitoring and diagnosis of photovoltaic system degradation only using maximum power point—the Suns‐Vmp method",  Prog. in Photovoltaics, July. 2018 link

2. R. V. K. Chavali, S. De Wolf, and M. A. Alam, "Device physics underlying silicon heterojunction and passivating-contact solar cells: A topical review", Prog. in Photovoltaics, April. 2018 (Review Article; Cover page highlight; KAUST SA collaboration) link

3. R. V. K. Chavali, J. V. Li, Corsin Battaglia, S. De Wolf, J. L. Gray, M. A. Alam, "A Generalized Theory Explains Anomalous Suns-Voc Response of Si Heterojunction Solar Cells", IEEE J. Photovoltaics, Jan. 2017 (Invited; EPFL, EMPA, NREL collaboration ) link, pdf

4. R. V. K. Chavali, E. C. Johlin, J. L. Gray, T. Buonassisi, and M. A. Alam, “A Framework for Process-to-Module Modeling of a-Si/c-Si (HIT) Heterojunction Solar Cells to Investigate the Cell-to-Module Efficiency Gap,” IEEE J. Photovoltaics, Jul. 2016. (Invited; MIT collaboration ) link, pdf

5. R. Asadpour*, R. V. K. Chavali*, M. R. Khan* and M. A. Alam, "Bifacial Si Heterojunction-Perovskite Organic-Inorganic Tandem to Produce Highly Efficient  ( η*T   ∼ 33%) Solar Cell", Appl. Phys. Lett, 2015. (*equal contributions) link, pdf

6. R. V. K. Chavali, J. E. Moore, X. Wang, M. A. Alam, M. S. Lundstrom, J. L. Gray, "Frozen Potential Approach to Separate the Photo-Current and Diode Injection Current in Solar Cells," IEEE J. Photovoltaics, 2015. link, pdf

7. R. V. K. Chavali, S. Khatavkar, C. V Kannan, V. Kumar, P. R. Nair, J. L. Gray, and M. A. Alam, “Multi-Probe Characterization of Inversion Charge for Self-Consistent Parameterization of HIT Cells,” IEEE J. Photovoltaics, 2015. (Invited; IIT Bombay, Moser Baer collaboration ) link, pdf

8. R. V. K. Chavali, J. R. Wilcox, B. Ray, J. L. Gray, and M. A. Alam, “Correlated Nonideal Effects of Dark and Light I--V Characteristics in a-Si/c-Si Heterojunction Solar Cells,” IEEE J. Photovoltaics, 2014. link, pdf

9. J. E. Moore, S. Dongaonkar, R. V. K. Chavali, M. A. Alam, and M. S. Lundstrom, “Correlation of Built-In Potential and I--V Crossover in Thin-Film Solar Cells,” IEEE J. Photovoltaics, 2014. link

Online Tools on NanoHub

• 1. J. L.  Gray, X. Wang, R. V. K. Chavali, X. Sun, A. Kanti, and J. R. Wilcox, “ADEPT 2.1,” NanoHUB.org, Mar-2014. (1-D opto-electronic numerical simulator with “frozen potential technique” for separating photo-generated carriers from contact injected carriers implemented)  link

  2. X. Sun, R. V. K. Chavali, S. Dongaonkar, S. V. Baddela, M. Lundstrom, M. A. Alam , “Purdue Solar Cell Model (PSM) – HIT cell (Version 2.0.0).  NanoHUB.org.” (Thermionic Emission/Diffusion based analytical model for Si heterojunction photovoltaics) link

Conference Papers and Presentations

1. X. Sun, H. Chung, R. V. K. Chavali, P. Bermel, M. A. Alam, "Real-time Monitoring of Photovoltaic Reliability Only Using Maximum Power Point – the Suns-Vmp Method", in 44th IEEE Photovoltaic Specialists Conference (PVSC), Jun., 2017. (Best Poster Award)

2. R. V. K. Chavali, J. V. Li, Corsin Battaglia, S. De Wolf, J. L. Gray, M. A. Alam, "Suns-Voc Characteristics of Si Heterojunction Solar Cells: Role of the Heterointerface", in 43rd IEEE Photovoltaic Specialists Conference (PVSC), Jun., 2016.

3. R. Asadpour, R. V. K. Chavali, M. A. Alam, "Physics-Based computational modeling of moisture ingress in solar modules: Location-specific corrosion and delamination",  in 43rd IEEE Photovoltaic Specialists Conference (PVSC), Jun., 2016.

4. X. Sun, R. Dubey, S. Chattopadhyay, M. R. Khan, R. V. K. Chavali, T. J. Silverman, A. Kottantharayil, J. Vasi, M. A. Alam, "A novel approach to thermal design of solar modules: Selective-spectral and radiative cooling",  in 43rd IEEE Photovoltaic Specialists Conference (PVSC), Jun., 2016. (Best Student Paper Finalist)

5. R. V. K. Chavali, E. C. Johlin, J. L. Gray, T. Buonassisi and M. A. Alam, “Process-to-Panel Modeling for a-Si/c-Si Heterojunction Solar Cells,” in 42nd IEEE Photovoltaic Specialists Conference (PVSC), Jun., 2015. (Best Student Paper Finalist)

6. R. V. K. Chavali, S. Khatavkar, B. M. Arora, P. Nair, J. Gray, and M. Alam, “Multi-Probe Characterization of Inversion Charge for Parameterization of HITTM Cells,” in 40th IEEE Photovoltaic Specialists Conference(PVSC), Jun., 2014. (Best Student Paper Finalist)

7. R. V. K. Chavali and J. L. Gray, “Numerical Method to Separate the Photo-Current and Contact Injection Current in Solar Cells,” in 40th IEEE Photovoltaic Specialists Conference(PVSC), Jun., 2014. (Best Poster Award)

8. R. V. K. Chavali, J. R. Wilcox, B. Ray, J. L. Gray, and M. A. Alam, “A diagnostic tool for analyzing the current-voltage characteristics in a-Si/c-Si heterojunction solar cells,” in 39th IEEE Photovoltaic Specialists Conference (PVSC), Jun., 2013.

9. R. V. K. Chavali, J. R. Wilcox, and J. L. Gray, “The effect of interface trap states on reduced base thickness a-Si/c-Si heterojunction solar cells,” 38th IEEE Photovoltaic Specialists Conference (PVSC), Jun. 2012.

10. R. V. K. Chavali, J. R. Wilcox and J. L. Gray, “Analysis of Interface Trap Recombination Process in a-Si/c-Si Heterojunction Solar Cells”, TECHCON 2012, Austin, TX, 2012

11.  J. R. Wilcox, R. V. K. Chavali and J. L. Gray, “Reducing the Temperature Coefficients of a-Si/c-Si Heterojunction Solar Cells”, TECHCON 2012, Austin, TX, 2012(Best in Session Award)

12. J. R. Wilcox, R. V. K. Chavali and J. L. Gray, “Using Detailed Numerical Models to Analyze HIT Solar Cells,” TECHCON 2011, Austin, TX, 2011 (Best in Session Award)

13. R. V. K. Chavali, J. Joseph, V. K. Chaubey, A. K. Saini, “Compact Drain Current Modeling in Long Channel SOI Double Gate FET for sub 40nm Gate Width”, at "15th International Workshop on Physics of Semiconductor Devices”, Dec, 2009.

14. S.K.Sahoo, R. V. K. Chavali, S. Neelam, “VLSI implementation of a Novel Personnel Private Branch Exchange Core for Next Generation Telecommunication”, at Sixth International Conference on “Precision, Meso, Micro and Nano Engineering”, Dec, 2009