journal article·2024

Synergistic nucleation regulation using 4,4′,4′′-tris(carbazol-9-yl)-triphenylamine and moisture for stably air-processed high-performance perovskite photodetectors

Guo He, Dezhi Yang, Sizhe Tao, Liqing Yang, Dechao Guo, Jingbo Zheng, Ji Li, Jiangshan Chen, Dongge Ma

Nanoscale· Volume 16· Issue 11
Publisher page

Abstract

Perovskite photodetectors (PPDs) offer a promising solution with low cost and high responsivity, addressing the limitations of traditional inorganic photodetectors. However, there is still room for improvement in terms of the dark current and stability of air-processed PPDs. In this study, 4,4',4''-tris(carbazol-9-yl)-triphenylamine (TCTA) was utilized as a nucleation agent to enhance the quality of perovskite films. The synergistic effect of TCTA and moisture promotes rapid nucleation of PbI2-PbCl2, resulting in an increased nucleation rate and the elimination of pinholes in the film. By employing additive engineering, we obtained a PbI2-PbCl2 layer with high coverage, leading to a low density of traps in the corresponding perovskite film. Consequently, the modified PPD exhibits a remarkable reduction in dark current density by over one order of magnitude, reaching 2.4 × 10-10 A cm-2 at -10 mV, along with a large linear dynamic range (LDR) of 183 dB. Furthermore, the resulting PPD demonstrates remarkable stability, retaining 90% of the initial external quantum efficiency (EQE) value even after continuous operation for over 3200 hours. Owing to a fast response time in the nanosecond range, the PPD could convert modulated light signals into electrical signals at a speed of 588 Kbit s-1, highlighting the great potential in the field of optical communication.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China

School of Physics and Optoelectronics, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China

Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China

Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China

Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials, South China University of Technology, 381 Wushan Road, Guangzhou 510640, China

Funding

National Science and Technology Planning Project · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · China Postdoctoral Science Foundation · Basic and Applied Basic Research Foundation of Guangdong Province · Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology

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