Bright and Stable Red Perovskite LEDs under High Current Densities

• DOI: 10.1021/acsami.3c16922
• Publication Date: 2024-02-09T04:05:45Z
• Authors: Zhixiang Ren; Bingbing Guo; Shengnan Liu; Yaxiao Lian; Yaxin Wang; Shiyu Xing; Yichen Yang; Gan Zhang; Weidong Tang; Yuxiang Gao; Zixiang Wang; Jiawei Hong; Minhui Yu; Shiyuan Zhang; Dongchen Lan; Chen Zou; Baodan Zhao; Dawei Di

Perovskite LEDs (PeLEDs) have emerged as a next-generation light-emitting technology. Recent breakthroughs were made in achieving highly stable near-infrared and green PeLEDs. However, the operational lifetimes (T50) of visible PeLEDs under high current densities (>10 mA cm–2) remain unsatisfactory (normally <100 h), limiting possibilities solid-state lighting AR/VR applications. This problem becomes more pronounced for mixed-halide (e.g., red blue) perovskite emitters which critical challenges such halide segregation spectral instability are present. Here, we demonstrate bright based on perovskites, showing measured T50 up to ∼357 h at currents ≥25 cm–2, record stability densities. The devices produce intense emission with maximum luminance 28,870 cd m–2 (radiance: 1584 W sr–1 m–2), is record-high Key this demonstration introduction sulfonamide, dipolar molecular stabilizer that effectively interacts ionic species emitters. It suppresses migration into charge-transport layers, resulting enhanced brightness These results represent substantial step toward emerging