Characterization of defects in copper antimony disulfide

Autor(es)

de Souza Lucas, Francisco Willian ^{[1, 2]} ; Peng, Haowei ^[2] ; Johnston, Steve ^[2] ; Dippo, Patricia C. ^[2] ; Lany, Stephan ^[2] ; Mascaro, Lucia H. ^[1] ; Zakutayev, Andriy ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, BR-13565905 Sao Carlos, SP - Brazil

^[2] Natl Renewable Energy Lab, Golden, CO 80401 - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS CHEMISTRY A; v. 5, n. 41, p. 21986-21993, NOV 7 2017.
• Citações Web of Science: 10

Resumo

Copper antimony disulfide (CuSbS2) with the chalcostibite structure is a promising photovoltaic (PV) absorber material with several excellent measured optoelectronic properties, such as a solar matched band gap and tunable hole concentration. However, much less is known from an experimental perspective about defects in CuSbS2, even though the defects are critical for solar cell performance. Here, we explore the defect properties in CuSbS2 thin film materials and photovoltaic devices using photoluminescence and capacitance-based spectroscopies, as well as first principles theoretical calculations. We measured three electrically and optically active acceptor defects in CuSbS2, and assigned them to the copper vacancies, sulfur vacancies, and/or copper on antimony antisites by comparison with theoretical calculations. Their activation energies, concentrations, and capture cross sections have been determined and compared to other chalcogenide absorber materials. These fundamental parameters should enable more accurate simulations of CuSbS2 PV devices, paving the way for future improvements in CuSbS2 solar cell efficiencies. (AU)

• Processo FAPESP: 14/12166-3 - O efeitos dos processos de pós-deposição sobre a performance de células solares de calcogenetos ternários de cobre
• Beneficiário: Francisco Willian de Souza Lucas
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 16/10513-3 - Preparação e Aplicação de Materiais Eletródicos Nanoestruturados em Eletro/fotoeletrocatálise sob Regime de Fluxo Contínuo: Uma Nova Abordagem para Síntese e Funcionalização de Sistemas Heterocíclicos.
• Beneficiário: Francisco Willian de Souza Lucas
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado