A modeling study on utilizing SnS2 as the buffer layer of CZT(S, Se) solar cells
| Autor: | Seyed Mohammad Mahdavi, Nima Taghavinia, Maryam Haghighi, Amirhossein Ahmadkhan Kordbacheh, Dae-Hwan Kim, Mehran Minbashi |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Chalcopyrite Analytical chemistry 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Buffer (optical fiber) 0104 chemical sciences Pulsed laser deposition law.invention law visual_art Solar cell engineering visual_art.visual_art_medium General Materials Science Kesterite 0210 nano-technology Current density Conduction band |
| Zdroj: | Solar Energy. 167:165-171 |
| ISSN: | 0038-092X |
| Popis: | CdS is conventionally used as the n-type buffer layer in chalcopyrite (CIG(S, Se)) and Kesterite (CZT(S, Se)) solar cells. CdS is toxic and there are wide attempts to find substitutes for it. Here, we suggest SnS2 as a possible alternative. SnS2 films were deposited by pulsed laser deposition (PLD), characterized to estimate carrier concentration and electron affinity values, and the obtained values were used to model a CZT(S, Se) solar cell. The experimental values of a benchmark CZT(S, Se) cell with efficiency of 12.3% were employed to obtain the density and energy position of defects in CZT(S, Se) and validating the model. We observed that SnS2 results in almost identical performance as CdS, showing slightly better current density, due to smaller conduction band offset of 0.21 eV compared to 0.28 eV for CdS. |
| Databáze: | OpenAIRE |
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