In situ growth of a 2D assisted passivation layer enabling high-performance and stable 2D/3D stacked perovskite photodetectors for visible light communication applications. Issue 17 (13th April 2022)

• Record Type: Journal Article
• Authors: Li, Tengteng; Li, Qingyan; Zhang, Haijian; Zhao, Hongliang; Wang, Silei; Li, Mengyao; Tang, Xin; Ding, Xin; Zhang, Yating; Yao, Jianquan
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 17(2022)
• Page Start: 6846
• Page End: 6856
• Publication Date: 2022-04-13
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2tc00587e
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Two-dimensional (2D) perovskites have shown more considerable advantages in terms of stability than their three-dimensional (3D) counterparts. Abstract : Two-dimensional (2D) perovskites have shown more considerable advantages in terms of stability than their three-dimensional (3D) counterparts. However, the intrinsic poor light absorption and charge transport capacity impede the improvement of device performance. Herein a novel 2D perovskite material containing butylammonium acetate (BAAc) is firstly introduced to fabricate high-performance and stable 2D/3D stacked perovskite photodetectors (PPDs). With the in situ growth of BAAc, the defects on the surfaces and grain boundaries of regular 3D perovskite (3D-PSK) films are dramatically passivated, and the larger size of long-chain BA + ions not only enhances the moisture stability but also improves the thermal stability of the 2D/3D stacked perovskite films and PPDs. As a result, the responsivity of the BAAc treated PPD (BAAc-PPD) reaches 2.11 A W −1 under the illumination of a 532 nm laser, and retains 78.5% of the initial value after 20 days of nonencapsulated storage at 10–15% relative humidity (RH). In addition, we successfully demonstrate the use of our PPDs in a visible light communication system. Our work provides a simple and effective method for the fabrication of high-performance and stable 2D/3D stacked PPDs, which has great application potential in visible light communication, imaging and environmental monitoring under complex environmental conditions.