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

IF 20.6 1区物理与天体物理 Q1 OPTICS

Advanced Photonics Pub Date : 2023-01-01 DOI:10.1117/1.AP.5.1.016001

G. Jang, Hyowon Han, Sunihl Ma, Junwoo Lee, Chang Uk Lee, Woo-Yang Jeong, J. Son, Dongki Cho, Ji‐Hee Kim, Cheolmin Park, Jooho Moon

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引用次数: 4

Abstract

Abstract. Perovskite light-emitting diodes (PeLEDs) are considered as promising candidates for next-generation 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.

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快速结晶驱动的高效相纯深蓝色Ruddlesden-Popper钙钛矿发光二极管

摘要钙钛矿发光二极管(PeLEDs)被认为是下一代溶液处理全彩色显示器的有前途的候选者。然而，深海蓝(3)的外量子效率(EQEs)和运行稳定性完全受到阻碍，因此可以成功获得适合深海蓝pled的带隙纯相2D-RPP薄膜。独特开发的快速结晶方法还可以形成随机取向的2D-RPP晶体，从而改善载流子的转移和输运动力学。因此，成功地展示了在437 nm发射的高性能深蓝pled，峰值EQE为0.63%。确认颜色坐标为(0.165,0.044)，与Rec.2020标准蓝域匹配良好，具有良好的光谱稳定性。

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来源期刊

Advanced Photonics OPTICS-

CiteScore

22.70

自引率

1.20%

发文量

审稿时长

18 weeks

期刊介绍： Advanced Photonics is a highly selective, open-access, international journal that publishes innovative research in all areas of optics and photonics, including fundamental and applied research. The journal publishes top-quality original papers, letters, and review articles, reflecting significant advances and breakthroughs in theoretical and experimental research and novel applications with considerable potential. The journal seeks high-quality, high-impact articles across the entire spectrum of optics, photonics, and related fields with specific emphasis on the following acceptance criteria: -New concepts in terms of fundamental research with great impact and significance -State-of-the-art technologies in terms of novel methods for important applications -Reviews of recent major advances and discoveries and state-of-the-art benchmarking. The journal also publishes news and commentaries highlighting scientific and technological discoveries, breakthroughs, and achievements in optics, photonics, and related fields.