Deep Blue Layered Lead Perovskite Light‐Emitting Diode. Issue 4 (4th December 2020)

• Record Type: Journal Article
• Authors: Yan, Siyu; Tian, Wanli; Chen, Hua; Tang, Kaixin; Lin, Tingting; Zhong, Gaoyu; Qiu, Longzhen; Pan, Xiaoyong; Wang, Weizhi
• Is Part Of: Advanced optical materials. Volume 9:Issue 4(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-12-04
• Subjects: 2D layers, deep blue emission -- layered structure -- light‐emitting diodes -- perovskites; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202001709
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: The perovskite light‐emitting diode (PeLED) based on lead has the advantages of excellent purity, high efficiency, and good brightness. In order to develop a highly luminescent and deep blue lead halide perovskite light emitting diode, here, a two‐dimensional layered lead perovskite owning the high deep blue photoluminescence quantum yield 80% at 445 nm is reported. In addition, the maximum recording brightness and the peak external quantum efficiency of the PeLED is 1315 cd m −2 and 3.08%, respectively, which outdoes that of previously reported deep blue lead PeLEDs. The half‐life of the device reaches 3.5 h at 5 V. This work clearly shows that the layered lead perovskite will provide a route to fabricate stable and high‐performance deep blue emission PeLEDs. Abstract : A lead perovskite owning the high blue photoluminescence quantum yield of 80% at 445 nm is reported. In addition, the maximum recording brightness of the perovskite light‐emitting diode (PeLED) is 1315 cd m −2, and the peak external quantum efficiency is 3.08%, which exceeds that of previously reported deep blue lead PeLEDs. The half‐life of the device reaches 3.5 h at 5 V.