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A modeling study on utilizing SnS2 as the buffer layer of CZT(S, Se) solar cells

Haghighi, M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.solener.2018.04.010
  3. Publisher: Elsevier Ltd , 2018
  4. Abstract:
  5. 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. © 2018 Elsevier Ltd
  6. Keywords:
  7. Buffer layer ; CZT(S, Se) solar cell ; Electron transport layer (ETL) ; Pulsed laser deposition (PLD) ; SCAPS software ; SnS2 ; Buffer layers ; Cadmium sulfide ; Cadmium sulfide solar cells ; Carrier concentration ; Copper compounds ; Electron affinity ; Electron transport properties ; II-VI semiconductors ; IV-VI semiconductors ; Pulsed laser deposition ; Pulsed lasers ; Selenium compounds ; Semiconducting tin compounds ; Solar cells ; Z transforms ; Conduction band offset ; Electron transport layers ; Energy position ; Experimental values ; Kesterites ; Model study ; Tin compounds ; Benchmarking ; Buffer zone ; Chalcopyrite ; Concentration (composition) ; Electron ; Energy efficiency ; Estimation method ; Experimental study ; Fuel cell ; Model validation ; Software ; Toxicity
  8. Source: Solar Energy ; Volume 167 , 2018 , Pages 165-171 ; 0038092X (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0038092X18303554