Eu 2+ ‐doped MAPbBr 3 Perovskite Nanocrystal in Silica Composites with Enhanced Stability for White Light Emission and Flexible X‐Ray Detectors

Perovskite nanocrystals (NCs), such as MAPbX 3 (MA + = methylammonium; X = Cl, Br, or I), have received attention owing to their excellent optoelectronic properties and ease of integrating with flexible substrates. Lanthanide ion doping is widely used as an effective strategy to enhance the optoelec...

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Published in:Advanced optical materials 2024-02, Vol.12 (6)
Main Authors: Wang, Shumei, Ma, Chuang, Liu, Xinmei, Huang, Wenliang, Yang, Tinghuan, Li, Chenxing, Ye, Haochen, Liu, Zhan, Yin, Lei, Yuan, Ningyi, Ding, Jianning, Chen, Lihua, Zhao, Kui
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container_title Advanced optical materials
container_volume 12
creator Wang, Shumei
Ma, Chuang
Liu, Xinmei
Huang, Wenliang
Yang, Tinghuan
Li, Chenxing
Ye, Haochen
Liu, Zhan
Yin, Lei
Yuan, Ningyi
Ding, Jianning
Chen, Lihua
Zhao, Kui
description Perovskite nanocrystals (NCs), such as MAPbX 3 (MA + = methylammonium; X = Cl, Br, or I), have received attention owing to their excellent optoelectronic properties and ease of integrating with flexible substrates. Lanthanide ion doping is widely used as an effective strategy to enhance the optoelectronic performance of perovskite NCs. However, incorporating the lanthanide dopant and ensuring the emission stability of the perovskite NCs in high‐performance optoelectronic devices remains a major challenge. Herein, the synthesis of Eu 2+ ‐doped MAPbBr 3 NCs within the channels of SBA‐15 is presented to improve their stability. The doped MAPbBr 3 NC@SBA‐15 composites exhibit significantly improved stability than that of undoped MAPbBr 3 NCs. The doped MAPbBr 3 NC@SBA‐15 composites exhibit moderate PL quantum yields and excellent stability under ambient conditions and UV irradiation. In addition, the MAEu 0.3 Pb 0.7 Br 3 NC@SBA‐15 composite applied in white‐light‐emitting diodes (WLEDs) achieves a color rendering index of 73.5. Moreover, MAEu 0.3 Pb 0.7 Br 3 NC@SBA‐15 can be combined with styrene‐ethylene‐butylene‐styrene to fabricate a flexible direct X‐ray detector, realizing a high sensitivity of 7592.2 µC Gy air −1  cm −2 and a low detection limit of
doi_str_mv 10.1002/adom.202301786
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Moreover, MAEu 0.3 Pb 0.7 Br 3 NC@SBA‐15 can be combined with styrene‐ethylene‐butylene‐styrene to fabricate a flexible direct X‐ray detector, realizing a high sensitivity of 7592.2 µC Gy air −1  cm −2 and a low detection limit of &lt;77 nGy air  s −1 ; this is an outstanding value for a NC‐based flexible direct X‐ray detector. 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title Eu 2+ ‐doped MAPbBr 3 Perovskite Nanocrystal in Silica Composites with Enhanced Stability for White Light Emission and Flexible X‐Ray Detectors
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