Understanding the Copassivation Effect of Cl and Se for CdTe Grain Boundaries
| العنوان: | Understanding the Copassivation Effect of Cl and Se for CdTe Grain Boundaries |
|---|---|
| المؤلفون: | Junliang Liu, Akash Shah, Thomas A. M. Fiducia, John M. Walls, Walajabad S. Sampath, Chris R. M. Grovenor, Amit Munshi, Ali Abbas, Ramesh Pandey, Anthony P. Nicholson |
| المصدر: | ACS Applied Materials & Interfaces. 13:35086-35096 |
| بيانات النشر: | American Chemical Society (ACS), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Materials science, Passivation, Analytical chemistry, food and beverages, chemistry.chemical_element, Electronic structure, Acceptor, Cadmium telluride photovoltaics, chemistry, General Materials Science, Density functional theory, Grain boundary, Electronic band structure, Selenium |
| الوصف: | Chlorine passivation treatment of cadmium telluride (CdTe) solar cells improves device performance by assisting electron-hole carrier separation at CdTe grain boundaries. Further improvement in device efficiency is observed after alloying the CdTe absorber layer with selenium. High-resolution secondary ion mass spectroscopy (NanoSIMS) imaging has been used to determine the distribution of selenium and chlorine at the CdTe grain boundaries in a selenium-graded CdTe device. Atomistic modeling based on density functional theory (DFT-1/2) further reveals that the presence of selenium and chlorine at an exemplar (110)/(100) CdTe grain boundary passivates critical acceptor defects and leads to n-type inversion at the grain boundary. The defect state analysis provides an explanation for the band-bending effects observed in the energy band alignment results, thereby elucidating mechanisms for high efficiencies observed in Se-alloyed and Cl-passivated CdTe solar cells. |
| تدمد: | 1944-8252 1944-8244 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ca50b277ffbb2410f41874eaf70f4ae https://doi.org/10.1021/acsami.1c06587 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....1ca50b277ffbb2410f41874eaf70f4ae |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 19448252 19448244 |
|---|