13December2019

Nano-Micro Letters

Lead-Free Halide Double Perovskite Materials: A New Superstar Towards Green and Stable Optoelectronic Applications

Liang Chu1, 2, Waqar Ahmad3, Wei Liu2, Jian Yang2, Rui Zhang2, Yan Sun1, Jianping Yang1, *, Xing’ao Li1, 2, *

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Nano-Micro Lett. (2019) 11: 16

First Online: 27 February 2019 (Review)

DOI:10.1007/s40820-019-0244-6

*Corresponding author. E-mail: yangjp@njupt.edu.cn (Jianping Yang); iamxali@njupt.edu.cn (Xing’ao Li)

 

Abstract

 


Toc

Lead-based halide perovskites have emerged as excellent semiconductors for a broad range of optoelectronic applications, such as photovoltaics, lighting, lasing, and photon detection. However, toxicity of lead and poor stability still represent significant challenges. Fortunately, halide double perovskite materials with formula of A2M(I)M(III)X6 or A2M(IV)X6 could be potentially regarded as stable and green alternatives for optoelectronic applications, where two divalent lead ions are substituted by combined one monovalent and one trivalent ions, or one tetravalent ion. Here, the article provides an up-to-date review on the developments of halide double perovskite materials and their related optoelectronic applications including photo detectors, X-ray detectors, photocatalyst, light-emitting diodes (LEDs) and solar cells. The synthesized halide double perovskite materials exhibit exceptional stability and a few possess superior optoelectronic properties. However, the number of synthesized halide double perovskites is limited, and more limited materials have been developed for optoelectronic applications to date. In addition, the band structures and carrier transport properties of the materials are still not desired, and the films still manifest low quality for photovoltaic applications. Therefore, we propose that continuing efforts are needed to develop more halide double perovskites, modulate the properties and grow high-quality films, with the aim to open the wild practical applications.


 

Keywords

Halide double perovskite; Optoelectronic applications; Efficiency; Stability; Toxicity

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