期刊
MICROELECTRONIC ENGINEERING
卷 273, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mee.2023.111960
关键词
Photodetectors; Organic-inorganic halide perovskites; Polycrystalline FAPbBr 3; Self-powered and high-speed; Electrochemical impedance spectroscopy
Halide perovskite compounds have emerged as a significant topic of research in the semiconductor field due to their various optoelectronic applications and advantageous features of low-cost and simple processing methods, as well as tunable properties. This study demonstrates the use of (NH2)2CHPbBr3 (FAPbBr3) as a robust visible-light detector with a direct band gap of 2.17 eV. The polycrystalline material was prepared through fusion of precursor compounds and showed excellent performance in terms of response time and energy efficiency, making it a promising candidate for optoelectronics in Visible Light Communication (VLC) and Internet of Things (IoT) systems.
Halide perovskite compounds have become a major research topic in the semiconductor field due to a variety of optoelectronic applications and their advantage of low-cost and simple processing methods, combined with tunable properties. The current work presents the use of (NH2)2CHPbBr3 (FAPbBr3), with a direct band gap of 2.17 eV, as a robust visible-light detector. The polycrystalline material was prepared by fusion of the precursor compounds PbBr2 and (NH2)2CHBr in solid state. It was then pressed in the form of a pellet and two transparent fluorine-doped tin oxide glasses were attached on both sides. The photodetector selectively responds to photon energies exceeding its band gap even without external bias, operating in an energy-efficient, self-powered mode. The response times to pulsed light are orders of magnitude shorter than these of previously reported FAPbBr3- based detectors. Electrochemical impedance spectroscopy determined in depth the electrical characteristics of the semiconducting perovskite with and without illumination. These results provide evidence that polycrystalline FAPbBr3, obtained with low-cost and simple synthetic methods compared to other forms, can be an excellent candidate for fast and self-powered optoelectronics, useful for Visible Light Communication (VLC) and Internet of Things (IoT) systems.
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