Dimensional Tailoring of Ultrahigh Vacuum Annealing-Assisted Quantum Wells for the Efficiency Enhancement of Perovskite Light-Emitting Diodes

Autor:	Weidong Xu, Xianjie Liu, Chang Yi, Heyong Wang, Slawomir Braun, Yong Yu, Fuxiang Ji, Feng Gao, Mats Fahlman, Chaoyang Kuang
Rok vydání:	2020
Předmět:	chemistry.chemical_classification Materials science business.industry Annealing (metallurgy) Iodide law.invention Glovebox chemistry law Optoelectronics General Materials Science Quantum efficiency business Quantum well Diode Light-emitting diode Perovskite (structure)
Zdroj:	ACS Applied Materials & Interfaces. 12:24965-24970
ISSN:	1944-8252 1944-8244
DOI:	10.1021/acsami.0c02217
Popis:	Quasi-two-dimensional (Q-2D) perovskites featured with multidimensional quantum wells (QWs) have been the main candidates for optoelectronic applications. However, excessive low-dimensional perovskites are unfavorable to the device efficiency due to the phonon-exciton interaction and the inclusion of insulating large organic cations. Herein, the formation of low-dimensional QWs is suppressed by removing the organic cation 1-naphthylmethylamine iodide (NMAI) through ultrahigh vacuum (UHV) annealing. Perovskite light-emitting diode (PLED) devices based on films annealed with optimized UHV conditions show a higher external quantum efficiency (EQE) of 13.0% and wall-plug efficiency of 11.1% compared to otherwise identical devices with films annealed in a glovebox.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e8d02ca9de5cdb811d8ce8cea968a34 https://doi.org/10.1021/acsami.0c02217 Zobrazit plný text záznamu