Large-scale planar and spherical light-emitting diodes based on arrays of perovskite quantum wires

作者：Zhang, Daquan; Zhang, Qianpeng; Ren, Beitao; Zhu, Yudong; Abdellah, Mohamed; Fu, Yu; Cao, Bryan; Wang, Chen; Gu, Leilei; Ding, Yucheng; Tsui, Kwong-Hoi; Fan, Sufeng; Poddar, Swapnadeep; Shu, Lei; Zhang, Yuting; Kuang, Dai-Bin; Liao, Jin-Feng; Lu, Yang; Zheng, Kaibo; He, Zhubing; Fan, Zhiyong^*

来源：Nature Photonics, 2022, 16(4): 284-+.

DOI：10.1038/s41566-022-00978-0

• PHASE

Halide perovskites are enticing candidates for highly efficient planar light-emitting diodes (LEDs) with commercial potential in displays and lighting. However, it remains a challenge for conventional solution fabrication processes to fabricate large-scale or non-planar LEDs due to the non-uniformity of perovskite films in conjunction with material stability issues. Here large-area highly uniform arrays of crystalline perovskite quantum wires are grown with emission spectra covering the whole visible range. Photoluminescence quantum yield of up to 92% and 5,644 hours as the time for photoluminescence to degrade down to its 50% of the initial value under ambient conditions are achieved for MAPbBr(3) quantum wires. LEDs based on these quantum wires on rigid and flexible planar substrates are fabricated up to a four-inch wafer size and also unique three-dimensional spherical LEDs with outstanding uniformity are reported. The results suggest that the approach developed here can be generalized to other unconventional three-dimensional LEDs in the future. @@@ The use of perovskite quantum-wire light emitters results in high-quality planar and spherical light-emitting diodes.

• 单位
  中山大学