基于噻吩-2-乙胺和双添加剂的具有高响应频率和更高稳定性的 2D/3D 钙钛矿光电探测器,ACS Applied Materials & Interfaces

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基于噻吩-2-乙胺和双添加剂的具有高响应频率和更高稳定性的 2D/3D 钙钛矿光电探测器
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-06-26 , DOI: 10.1021/acsami.3c07712
Lixian Jiang ₁ , Zhewei Li ₁ , Qingshun Dong ₂ , Xin Rong ₁ , Guifang Dong ₁

Affiliation

有机-无机卤化铅钙钛矿材料近年来受到广泛关注。然而，这些材料的稳定性差严重限制了钙钛矿器件的商业应用。在这里，我们使用噻吩-2-乙基碘化铵（TEAI）材料作为有机间隔物NH ₄ SCN和NH ₄ Cl作为双添加剂来实现高稳定性的二维（2D）/三维（3D）钙钛矿薄膜用于钙钛矿光电探测器。然后，我们研究了双添加剂对钙钛矿薄膜的取向和结晶度的不同影响。在室温下，优化的2D/3D钙钛矿光电探测器表现出良好的性能，具有高外量子效率（EQE）（72%）、大响应度（0.36 A/W）、高探测率（2.46 × 10¹² Jones 在 0 V 偏压下）、高响应频率 (1.7 MHz) 和更高的稳定性（在 RT 和 10% RH 条件下存储 2000 小时后保留 90% 的光电流）。基于这些器件，实现了双通道光传输系统和光强加法器。这项研究的结果表明，通过简单的工艺，基于 TEAI 和双添加剂的 2D/3D 钙钛矿光电探测器在光强度加法器和光通信系统中具有广阔的应用前景。

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2D/3D Perovskite Photodetectors with High Response Frequency and Improved Stability Based on Thiophene-2-ethylamine and Dual Additives

Organic–inorganic lead halide perovskite materials have received great attention in recent years. However, the poor stability of these materials severely limits the commercial application of perovskite devices. Here, we used thiophene-2-ethylammonium iodide (TEAI) material as the organic spacer NH₄SCN and NH₄Cl as the dual additives to realize high-stability two-dimensional (2D)/three-dimensional (3D) perovskite thin films for perovskite photodetectors. Then, we investigated different effects of the dual additives on the orientation and crystallinity of the perovskite films. At room temperature, the optimized 2D/3D perovskite photodetectors exhibit good performance with high external quantum efficiency (EQE) (72%), large responsivity (0.36 A/W), high detectivity (2.46 × 10¹² Jones at the bias of 0 V), high response frequency (1.7 MHz), and improved stability (retains 90% photocurrent after 2000 h storage in RT and 10% RH conditions). Based on these devices, a dual-channel optical transport system and a light-intensity adder are achieved. The results of this study indicate that, with a simple process, the TEAI and dual-additives based 2D/3D perovskite photodetectors have promising applications in light-intensity adder and optical communication systems.

更新日期：2023-06-26

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