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http://hdl.handle.net/1843/65686| Type: | Artigo de Periódico |
| Title: | CdS and Zn1−xSnxOy buffer layers for CIGS solar cells |
| Authors: | Pedro M. P. Salomé Joaquim Fernando Monteiro de Carvalho Pratas Leitão Sascha Sadewasser Jan Keller Tobias Törndahl Jennifer Cláudia Passos Teixeira Nicoleta Nicoara Rodrigo Ribeiro de Andrade Daniel G. Stroppa Juan Carlos González Pérez Marika Edoff |
| Abstract: | Thin film solar cells based on Cu(In,Ga)Se2 (CIGS), where just the buffer layer is changed, were fabricated and studied. The effects of two different buffer layers, CdS and ZnxSn1−xOy (ZnSnO), are compared using several characterization techniques. We compared both devices and observe that the ZnSnO-based solar cells have similar values of power conversion efficiency as compared to the cells with CdS buffer layers. The ZnSnO-based devices have higher values in the short-circuit current (Jsc) that compensate for lower values in fill factor (FF) and open circuit voltage (Voc) than CdS based devices. Kelvin probe force microscopy (KPFM) results indicate that CdS provides junctions with slightly higher surface photovoltage (SPV) than ZnSnO, thus explaining the lower Voc potential for the ZnSnO sample. The TEM analysis shows a poly-crystalline ZnSnO layer and we have not detected any strong evidence of diffusion of Zn or Sn into the CIGS. From the photoluminescence measurements, we concluded that both samples are being affected by fluctuating potentials, although this effect is higher for the CdS sample. |
| Subject: | Filmes finos Células solares |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.solmat.2016.09.023 |
| URI: | http://hdl.handle.net/1843/65686 |
| Issue Date: | 2017 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0927024816303646?via%3Dihub |
| metadata.dc.relation.ispartof: | Solar Energy Materials and Solar Cells |
| Appears in Collections: | Artigo de Periódico |
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