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Miao, Yanfeng; Ke, You; Wang, Nana; Zou, Wei; Xu, Mengmeng; Cao, Yu; Sun, Yan; Yang, Rong; Wang, Ying; Tong, Yunfang; Xu, Wenjie; Zhang, Liangdong; Li, Renzhi; Li, Jing; He, Haiping; Jin, Yizheng; Gao, Feng; Huang, Wei; Wang, Jianpu
Nature communications, 08/2019, Letnik: 10, Številka: 1Journal Article
Solution-processable perovskites show highly emissive and good charge transport, making them attractive for low-cost light-emitting diodes (LEDs) with high energy conversion efficiencies. Despite recent advances in device efficiency, the stability of perovskite LEDs is still a major obstacle. Here, we demonstrate stable and bright perovskite LEDs with high energy conversion efficiencies by optimizing formamidinium lead iodide films. Our LEDs show an energy conversion efficiency of 10.7%, and an external quantum efficiency of 14.2% without outcoupling enhancement through controlling the concentration of the precursor solutions. The device shows low efficiency droop, i.e. 8.3% energy conversion efficiency and 14.0% external quantum efficiency at a current density of 300 mA cm , making the device more efficient than state-of-the-art organic and quantum-dot LEDs at high current densities. Furthermore, the half-lifetime of device with benzylamine treatment is 23.7 hr under a current density of 100 mA cm , comparable to the lifetime of near-infrared organic LEDs.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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