Colloidal Quantum Dot Photovoltaics Enhanced by Perovskite Shelling

Autor(es):Mostrar menos -

Yang, Zhenyu ^[1] ; Janmohamed, Alyf ^[1] ; Lan, Xinzheng ^[1] ; de Arquer, F. Pelayo Garcia ^[1] ; Voznyy, Oleksandr ^[1] ; Yassitepe, Emre ^[1] ; Kim, Gi-Hwan ^[1] ; Ning, Zhijun ^{[1, 2]} ; Gong, Xiwen ^[1] ; Comin, Riccardo ^[1] ; Sargent, Edward H. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Toronto, Edward S Rogers Dept Elect & Comp Engn, Toronto, ON M5S 3G4 - Canada

^[2] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210 - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: Nano Letters; v. 15, n. 11, p. 7539-7543, NOV 2015.
• Citações Web of Science: 83

Resumo

Solution-processed quantum dots are a promising material for large-scale, low-cost solar cell applications. New device architectures and improved passivation have been instrumental in increasing the performance of quantum dot photovoltaic devices. Here we report photovoltaic devices based on inks of quantum dot on which we grow thin perovskite shells in solid-state films. Passivation using the perovskite was achieved using a facile solution ligand exchange followed by postannealing. The resulting hybrid nanostructure created a more intrinsic CQD film, which, when incorporated into a photovoltaic device with graded bandstructure, achieved a record solar cell performance for single-step-deposited CQD films, exhibiting an AM1.5 solar power conversion efficiency of 8.95%. (AU)

• Processo FAPESP: 14/18327-9 - Quantum dots coloidais com defeitos superficiais passivados para aplicações em células solares de filmes finos de heterojunção P-N
• Beneficiário: Emre Yassitepe
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado