Zobrazeno 1 - 10
of 429
pro vyhledávání: '"Robert W. Collins"'
Autor:
Dhurba R. Sapkota, Balaji Ramanujam, Puja Pradhan, Mohammed A. Razooqi Alaani, Ambalanath Shan, Michael J. Heben, Sylvain Marsillac, Nikolas J. Podraza, Robert W. Collins
Publikováno v:
Materials, Vol 17, Iss 16, p 4048 (2024)
Flux calibrations in multi-source thermal co-evaporation of thin films have been developed based on real-time spectroscopic ellipsometry (RTSE) measurements. This methodology has been applied to fabricate CuInSe2 (CIS) thin film photovoltaic (PV) abs
Externí odkaz:
https://doaj.org/article/05855fac5f75467f81f6c0b149648b2b
Autor:
Khagendra P. Bhandari, Dhurba R. Sapkota, Manoj K. Jamarkattel, Quenton Stillion, Robert W. Collins
Publikováno v:
Nanomaterials, Vol 13, Iss 11, p 1795 (2023)
Zinc oxide (ZnO) nanoparticles have shown great potential because of their versatile and promising applications in different fields, including solar cells. Various methods of synthesizing ZnO materials have been reported. In this work, controlled syn
Externí odkaz:
https://doaj.org/article/62cd9e35ec9440f2a498a781a88b1f88
Autor:
Mohammed A. Razooqi Alaani, Prakash Koirala, Adam B. Phillips, Geethika K. Liyanage, Rasha A. Awni, Dhurba R. Sapkota, Balaji Ramanujam, Michael J. Heben, Stephen K. O’Leary, Nikolas J. Podraza, Robert W. Collins
Publikováno v:
Materials, Vol 14, Iss 19, p 5649 (2021)
Motivated by their utility in CdTe-based thin film photovoltaics (PV) devices, an investigation of thin films of the magnesium-zinc oxide (MgxZn1−xO or MZO) alloy system was undertaken applying spectroscopic ellipsometry (SE). Dominant wurtzite pha
Externí odkaz:
https://doaj.org/article/2eda527c197945e7a62320c31b87f38f
Publikováno v:
Materials, Vol 13, Iss 19, p 4259 (2020)
A new method combining in-situ real-time spectroscopic ellipsometry and optical modeling to optimize the thickness of an anti-reflective (AR) coating for Cu(In,Ga)Se2 (CIGS) solar cells is described and applied directly to fabricate devices. The mode
Externí odkaz:
https://doaj.org/article/d8a5af1dc92243b4915df4f5addd3e45
Autor:
Grace Rajan, Krishna Aryal, Shankar Karki, Puruswottam Aryal, Robert W. Collins, Sylvain Marsillac
Publikováno v:
Journal of Spectroscopy, Vol 2018 (2018)
In view of the large-scale utilization of Cu(In,Ga)Se2 (CIGS) solar cells for photovoltaic application, it is of interest not only to enhance the conversion efficiency but also to reduce the thickness of the CIGS absorber layer in order to reduce the
Externí odkaz:
https://doaj.org/article/85d9b1d6923841cd936be8e1ef1bbb6c
Autor:
Dipendra Adhikari, Maxwell M. Junda, Corey R. Grice, Sylvain X. Marsillac, Robert W. Collins, Nikolas J. Podraza
Publikováno v:
Materials, Vol 12, Iss 10, p 1699 (2019)
Nanocrystalline hydrogenated silicon (nc-Si:H) substrate configuration n-i-p solar cells have been fabricated on soda lime glass substrates with active absorber layers prepared by plasma enhanced chemical vapor deposition (PECVD) and radio frequency
Externí odkaz:
https://doaj.org/article/3f48b16e113040a584f790790bb819a5
Autor:
Puja Pradhan, Puruswottam Aryal, Dinesh Attygalle, Abdel-Rahman Ibdah, Prakash Koirala, Jian Li, Khagendra P. Bhandari, Geethika K. Liyanage, Randy J. Ellingson, Michael J. Heben, Sylvain Marsillac, Robert W. Collins, Nikolas J. Podraza
Publikováno v:
Materials, Vol 11, Iss 1, p 145 (2018)
Real time spectroscopic ellipsometry (RTSE) has been applied for in-situ monitoring of the first stage of copper indium-gallium diselenide (CIGS) thin film deposition by the three-stage co-evaporation process used for fabrication of high efficiency t
Externí odkaz:
https://doaj.org/article/db309d8b3f814c638c2360c60de83e97
Publikováno v:
Materials, Vol 9, Iss 3, p 128 (2016)
Optimization of thin film photovoltaics (PV) relies on characterizing the optoelectronic and structural properties of each layer and correlating these properties with device performance. Growth evolution diagrams have been used to guide production of
Externí odkaz:
https://doaj.org/article/9498dbe4f5744686ada8c17e74603b68
Autor:
Ramez Hosseinian Ahangharnejhad, Adam B. Phillips, Zhaoning Song, Ilke Celik, Kiran Ghimire, Prakash Koirala, Randy J. Ellingson, Robert W. Collins, Nikolas J. Podraza, Yanfa Yan, Michael J. Heben
Publikováno v:
Sustainable Energy & Fuels. 6:2718-2726
The calculated levelized cost of electricity for single junction and tandem devices show that when the time for perovskite devices to degrade to 85% of the original output (T85) is only 3 years, tandem device are economically favorable.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5225ea9519bc7d8f0c41f4174dbc52ce
https://doi.org/10.1039/d2se00029f
https://doi.org/10.1039/d2se00029f
Publikováno v:
2022 IEEE 49th Photovoltaics Specialists Conference (PVSC).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::211b1d440378f151a54ee0f11e2e333d
https://doi.org/10.1109/pvsc48317.2022.9938866
https://doi.org/10.1109/pvsc48317.2022.9938866