Zhang Yu, Yan Yun-Fan, Mi Jia-Rong, Wang Shuai-Hua, Wang Ming-Sheng, Guo Guo-Cong
College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350608, P. R. China.
Adv Sci (Weinh). 2023 Oct;10(28):e2302978. doi: 10.1002/advs.202302978. Epub 2023 Aug 4.
Single-component semiconductors with photoresponse to full solar spectrum are highly desirable to simplify the device structure of commercial photodetectors and to improve solar conversion or photocatalytic efficiency but remain scarce. This work reports bottom-up photosynthesis of an air-stable radical semiconductor using BiI and a photochromism-active benzidine derivative as a photosensitive functional motif. This semiconductor shows photoconductivity to full solar spectrum contributed by radical and non-radical forms of the benzidine derivative. It has also the potential to detect X-rays because of strong X-ray absorption coefficient. This finding opens up a new synthetic method for radical semiconductors and may find applications on extending photoresponsive ranges of perovskites, transition metal sulfides, and other materials.
对整个太阳光谱具有光响应的单组分半导体对于简化商业光电探测器的器件结构以及提高太阳能转换或光催化效率非常理想，但仍然稀缺。这项工作报道了使用BiI和一种具有光致变色活性的联苯胺衍生物作为光敏功能基序，自下而上光合作用制备出一种空气稳定的自由基半导体。这种半导体对整个太阳光谱表现出光电导性，这是由联苯胺衍生物的自由基和非自由基形式所贡献的。由于其具有很强的X射线吸收系数，它还具有检测X射线的潜力。这一发现为自由基半导体开辟了一种新的合成方法，并且可能在扩展钙钛矿、过渡金属硫化物及其他材料的光响应范围方面找到应用。
