Rapid crystallization-driven high-efficiency phase-pure deep-blue Ruddlesden–Popper perovskite light-emitting diodes

被引：0

作者：

Gyumin Jang ^{[1
]}

Hyowon Han ^{[1
]}

Sunihl Ma ^{[1
]}

Junwoo Lee ^{[1
]}

Chan Uk Lee ^{[1
]}

Wooyong Jeong ^{[1
]}

Jaehyun Son ^{[1
]}

Dongki Cho ^{[2
,3
]}

JiHee Kim ^{[2
,3
]}

Cheolmin Park ^{[1
]}

Jooho Moon ^{[1
]}

机构：

[1] Yonsei University, Department of Materials Science and Engineering

[2] Sungkyunkwan University, Department of Energy Science

[3] Institute for Basic Science, Center for Integrated Nanostructure Physics

来源：

Advanced Photonics | 2023年 / 5卷 / 01期

关键词：

D O I：

暂无

中图分类号：

TN312.8 [];

学科分类号：

0803 ;

摘要：

Perovskite light-emitting diodes(PeLEDs) are considered as promising candidates for nextgeneration solution-processed full-color displays. However, the external quantum efficiencies(EQEs) and operational stabilities of deep-blue(<460 nm) PeLEDs still lag far behind their red and green counterparts.Herein, a rapid crystallization method based on hot-antisolvent bathing is proposed for realization of deep-blue PeLEDs. By promoting immediate removal of the precursor solvent from the wet perovskite films, development of the quasi-two-dimensional(2D) Ruddlesden–Popper perovskite(2D-RPP) crystals with n values >3 is hampered completely, so that phase-pure 2D-RPP films with bandgaps suitable for deep-blue PeLEDs can be obtained successfully. The uniquely developed rapid crystallization method also enables formation of randomly oriented 2D-RPP crystals, thereby improving the transfer and transport kinetics of the charge carriers. Thus, high-performance deep-blue PeLEDs emitting at 437 nm with a peak EQE of 0.63% are successfully demonstrated. The color coordinates are confirmed to be(0.165, 0.044), which match well with the Rec.2020 standard blue gamut and have excellent spectral stability.

引用

页码：13 / 23

页数：11