期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 9, 页码 11619-11625出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c23328
关键词
HOF; broadband; photochromism; semiconductor; viologen
资金
- National Natural Science Foundation of China [21921001, 21827813, 22073102]
- Key Research Program of Frontier Science, Chinese Academy of Sciences [QYZDB-SSW-SLH020]
The study synthesized the first photochromic semiconductive hydrogen-bonded organic framework with a wide range of photoelectric response, which has important practical applications in solar energy conversion and photodetection.
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-2(bpyb)](H2PO4)(2)center dot 2H(2)O (1), using the polycyclic viologen cation [H-2(bpyb)] (bpyb = 1,4-bis(tetrapyridyl)benzene). After 1 s of xenon lamp irradiation, compound 1 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 (I-irr/I-dark) can be as high as 300 times under the irradiation of the 808 nm laser with a power of 1.9 W cm(-2). In addition, under the 808 nm light source, the on/off ratio of 1B is 35 times that of 1A.
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