학술논문
Investigation and optimization of Cd-free buffer layers In2S3 and Zn(O, S) for Cu2ZnSn(S, Se)4-based solar cells
Document Type
Conference
Author
Source
2017 IEEE 44th Photovoltaic Specialist Conference (PVSC) Photovoltaic Specialist Conference (PVSC), 2017 IEEE 44th. :791-795 Jun, 2017
Subject
Language
Abstract
In this work we show that both of the investigated buffer materials, In2S3 and Zn(O, S), were suitable for alternative Cd-free buffer layers for use in kesterite CU2ZnSn(S, Se)4 solar cells. The In2S3 buffer was optimized by varying the layer thickness and applied heat treatment resulting in a maximum average efficiency of 4.6 %, compared to 6.1 % for CdS. We also showed that the band alignment of absorber and the Zn(O, S) buffer can be adjusted by variation of the sulphur content. The best average efficiency obtained from the Zn(O, S) series was 4.6 %.