Type‐II Perovskite Quantum Dots Heterostructures for Highly Sensitive, Stable, Flexible Self‐Powered Photodetectors

IF 10 1区物理与天体物理 Q1 OPTICS

Laser & Photonics Reviews Pub Date : 2025-10-01 DOI:10.1002/lpor.202501840

Jingxuan Wang, Nan Ding, Donggang Li, Jianing Fan, Ge Zhu, Rong Xu, Wen Xu

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引用次数: 0

Abstract

Flexible self‐powered photodetectors (PDs) are highly desirable for next‐generation portable and wearable optoelectronics, but it still remains a huge challenge to realize high sensitivity, operational stability, and mechanical flexibility. In this work, a novel Type‐II CsPbI3:Nd3+@Cs2SnI6 perovskite quantum dots (PQDs) heterostructures is employed as photosensitive layers, which can significantly enhance charge separation and transport, reduce trap density, and suppress interface carrier recombination. Compared to the pristine CsPbI3 PQDs PDs, the flexible self‐powered PDs based on Type‐II CsPbI3:Nd3+@Cs2SnI6 PQDs heterostructures exhibit exceptional performance with the responsivity (R) of 416.1 mA W−1, detectivity (D*) of 3.75 × 1012 Jones, and external quantum efficiency (EQE) of 85.3%, respectively. Furthermore, the flexible self‐powered PDs show remarkable enhanced long‐term and operational stability. The responsivity of the device maintains 84.3% and 85.6% of its original value after 30 days of storage and two thousand bending cycles, respectively. This work highlights a new attempt for designing Type‐II PQD heterostructures self‐powered PDs, which has application potential in optoelectronic devices.

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用于高灵敏、稳定、灵活的自供电光电探测器的II型钙钛矿量子点异质结构

柔性自供电光电探测器（pd）是下一代便携式和可穿戴光电子器件的理想选择，但实现高灵敏度，操作稳定性和机械灵活性仍然是一个巨大的挑战。在这项工作中，采用一种新型的II型CsPbI3:Nd3+@Cs2SnI6钙钛矿量子点（PQDs）异质结构作为光敏层，可以显著增强电荷分离和输运，降低陷阱密度，抑制界面载流子复合。与原始的CsPbI3 PQDs相比，基于Type - II CsPbI3:Nd3+@Cs2SnI6 PQDs异质结构的柔性自供电PQDs表现出优异的性能，响应率(R)为416.1 mA W−1，探测率（D*）为3.75 × 1012 Jones，外量子效率（EQE）为85.3%。此外，柔性自供电pd显示出显著增强的长期和运行稳定性。经过30天的储存和2000次弯曲循环后，器件的响应率分别保持在原值的84.3%和85.6%。本研究为II型PQD异质结构自供电PQD的设计提供了新的尝试，在光电器件中具有应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Laser & Photonics Reviews 物理-光学

CiteScore

14.20

自引率

5.50%

发文量

314

审稿时长

2 months

期刊介绍： Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.