Efficient Luminescence from Perovskite Quantum Dot Solids

Autor(es)

Kim, Younghoon ^[1] ; Yassitepe, Emre ^{[2, 1]} ; Voznyy, Oleksandr ^[1] ; Comin, Riccardo ^[1] ; Walters, Grant ^[1] ; Gong, Xiwen ^[1] ; Kanjanaboos, Pongsakorn ^[1] ; Nogueira, Ana F. ^[2] ; Sargent, Edward H. ^[1]

Afiliação do(s) autor(es)

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

^[2] Univ Estadual Campinas, UNICAMP, Inst Chem, BR-13084971 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED MATERIALS & INTERFACES; v. 7, n. 45, p. 25007-25013, NOV 18 2015.
• Citações Web of Science: 207

Resumo

Nanocrystals of CsPbX3 perovskites are promising materials for light-emitting optoelectronics because of their colloidal stability, optically tunable bandgap, bright photoluminescence, and excellent photoluminescence quantum yield. Despite their promise, nanocrystal-only films of CsPbX3 perovskites have not yet been fabricated; instead, highly insulating polymers have been relied upon to compensate for nanocrystals unstable surfaces. We develop solution chemistry that enables single-step casting of perovskite nanocrystal films and overcomes problems in both perovskite quantum dot purification and film fabrication. Centrifugally cast films retain bright photoluminescence and achieve dense and homogeneous morphologies. The new materials offer a platform for optoelectronic applications of perovskite quantum dot solids. (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