Chen Tong, Jiang Hui-Bo, Jiang Kai-Bin, Hu De-Lin, Cai Li-Zhen, Wang Ming-Sheng, Guo Guo-Cong
College of Chemical Engineering, Fuzhou University, Fuzhou 350116, Fujian, P. R. China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, P. R. China.
ACS Appl Mater Interfaces. 2022 Mar 9;14(9):11619-11625. doi: 10.1021/acsami.1c23328. Epub 2022 Feb 24.
Semiconductors with broadband photoelectric response have important practical needs in many aspects such as solar energy conversion, photocatalysis, and photodetection. We synthesized the first photochromic semiconductive hydrogen-bonded organic framework (HOF), H(bpyb)·2HO (), using the polycyclic viologen cation [H(bpyb)] (bpyb = 1,4-bis(tetrapyridyl)benzene). After 1 s of xenon lamp irradiation, compound showed a visible color change from the initial yellowish to dark purple after continuous irradiation. The photoinduced radical product has an absorption band covering 200-1700 nm, which is wider than the absorption ranges of silicon and perovskites. It produced photocurrent when irradiated with a xenon lamp or a laser (355, 532, or 808 nm). The on/off ratio of the current (/) can be as high as 300 times under the irradiation of the 808 nm laser with a power of 1.9 W cm. In addition, under the 808 nm light source, the on/off ratio of is 35 times that of .
具有宽带光电响应的半导体在太阳能转换、光催化和光检测等许多方面都有重要的实际需求。我们使用多环紫精阳离子[H(bpyb)]（bpyb = 1,4-双（四吡啶基）苯）合成了首个光致变色半导体氢键有机框架（HOF），即H(bpyb)·2HO（）。在氙灯照射1秒后，化合物在持续照射下呈现出从初始淡黄色到深紫色的可见颜色变化。光致自由基产物具有覆盖200 - 1700 nm的吸收带，比硅和钙钛矿的吸收范围更宽。当用氙灯或激光（355、532或808 nm）照射时，它会产生光电流。在功率为1.9 W cm的808 nm激光照射下，电流的开/关比（/）可高达300倍。此外，在808 nm光源下，的开/关比是 的35倍。
