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Large-scale planar and spherical light-emitting diodes based on arrays of perovskite quantum wires
Nature Photonics ( IF 35.0 ) Pub Date : 2022-03-31 , DOI: 10.1038/s41566-022-00978-0
Daquan Zhang , Qianpeng Zhang , Beitao Ren , Yudong Zhu , Mohamed Abdellah , Yu Fu , Bryan Cao , Chen Wang , Leilei Gu , Yucheng Ding , Kwong-Hoi Tsui , Sufeng Fan , Swapnadeep Poddar , Lei Shu , Yuting Zhang , Dai-Bin Kuang , Jin-Feng Liao , Yang Lu , Kaibo Zheng , Zhubing He , Zhiyong Fan

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 MAPbBr3 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.



中文翻译:

基于钙钛矿量子线阵列的大型平面和球形发光二极管

卤化物钙钛矿是高效平面发光二极管 (LED) 的诱人候选者,在显示器和照明方面具有商业潜力。然而,由于钙钛矿薄膜的不均匀性以及材料稳定性问题,制造大规模或非平面 LED 的传统解决方案制造工艺仍然是一个挑战。在这里,晶体钙钛矿量子线的大面积高度均匀阵列生长,发射光谱覆盖整个可见光范围。MAPbBr 3的光致发光量子产率高达 92% 和 5,644 小时,因为在环境条件下光致发光降解至其初始值的 50% 的时间是 MAPbBr 3量子线。基于刚性和柔性平面基板上的这些量子线的 LED 可制造到 4 英寸的晶圆尺寸,并且还报道了具有出色均匀性的独特 3D 球形 LED。结果表明,这里开发的方法将来可以推广到其他非常规的 3D LED。

更新日期:2022-03-31
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