期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 6, 期 21, 页码 4360-4364出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b02011
关键词
-
类别
资金
- Singapore NRF through the Competitive Research Program [NRF-CRP4-2008-03, NRF-CRP14-2014-03]
- NTU-A*STAR Silicon Technologies Centre of Excellence [112 3510 0003]
Lead-halide perovskites have transcended photovoltaics. Perovskite light-emitting diodes (PeLEDs) emerge as a new field to leverage on these fascinating semiconductors. Here, we report the first use of completely inorganic CsPbBr3 thin films for enhanced light emission through controlled modulation of the trap density by varying the CsBr-PbBr2 precursor concentration. Although pure CsPbBr3 films can be deposited from equimolar CsBr-PbBr2 and CsBr-rich solutions, strikingly narrow emission line (17 nm), accompanied by elongated radiative lifetimes (3.9 ns) and increased photo-luminescence quantum yield (16%), was achieved with the latter. This is translated into the enhanced performance of the resulting PeLED devices, with lower turn-on voltage (3 V), narrow electroluminescence spectra (18 nm) and higher electroluminescence intensity (407 Cd/m(2)) achieved from the CsBr-rich solutions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据