Fast and broadband photoelectric detection is a key process to many photoelectronic applications, during which the semiconductor light absorber plays a critical role. In this report, we prepared Cu-In-Zn-S (CIZS) nanospheres with different compositions via a facile hydrothermal method. These nanospheres were ~200 nm in size and comprised of many small nanocrystals. A photodetector responded to the visible spectrum was demonstrated by spraying the solution processed nanospheres onto gold interdigital electrodes. The photoelectric characterization of these devices revealed that CIZS nanospheres with low molar ratio of n(Cu)/n(In) exhibited improved photoelectric response compared to those with high n(Cu)/n(In), which was attributed to the reduced defects. The relatively large switching ratio (I_on/I_off), fast response and wide spectral coverage of the CIZS-based photodetector render it a promising potential candidate for photoelectronic applications.

快速和宽带光电检测是许多光电应用的关键过程，在此期间半导体光吸收器起着至关重要的作用。在本报告中，我们通过简便的水热法制备了具有不同组成的Cu-In-Zn-S（CIZS）纳米球。这些纳米球的大小约为200 nm，由许多小的纳米晶体组成。通过将溶液处理的纳米球喷涂到金叉指电极上，证明了对可见光谱有响应的光电探测器。这些器件的光电特性显示，与高n（Cu）/ n的那些相比，低n（Cu）/ n（In）摩尔比的CIZS纳米球表现出改善的光电响应。（In），这归因于缺陷的减少。基于CIZS的光电探测器具有相对较大的开关比（I _on / I _off），快速响应和较宽的光谱覆盖范围，使其成为光电子应用的有希望的潜在候选者。