Large near-infrared lateral photovoltaic effect in an organic egg albumin/Si structure

Previously reported photoelectric devices have mainly been limited to inorganic materials. Even though preparing high-performance photoelectric devices with organic biomaterials is an inevitable trend in commercialization, fabricating organic photoelectric devices based on naturally occurring materi...

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Bibliographic Details
Published in:Optics letters 2022-08, Vol.47 (16), p.4076
Main Authors: Zhao, Xinhui, Wang, Renzhi, Bao, Peng, Niu, Yiru, Zheng, Diyuan, Zhao, Zhuyikang, Su, Nan, Hu, Chenhua, Hu, Su, Wang, Ying, Wang, Hui
Format: Article
Language:English
Subjects:
Albumins
Biomedical materials
Commercialization
Eggs
Free electrons
Inorganic materials
Photoelectricity
Photovoltaic cells
Photovoltaic effect
Sensitivity
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Summary:Previously reported photoelectric devices have mainly been limited to inorganic materials. Even though preparing high-performance photoelectric devices with organic biomaterials is an inevitable trend in commercialization, fabricating organic photoelectric devices based on naturally occurring materials with high sensitivity remains a great challenge due to the high resistivity of and few free electrons in these materials. Herein, high-performance photoelectric devices based on an egg albumin (EA)/Si structure are proposed, and a new, to the best of our knowledge, perspective is provided on photodetection in naturally occurring materials by utilizing the surface state of p-Si to separate light-induced carriers effectively. The free electrons of metal atoms restrain the surface states, leading to a sensitivity of 5 mV/mm for metal/Si devices, while the sensitivity of the EA/Si device in the near-infrared region is greatly promoted to 357 mW/mm, which is intimately related to the lack of effect of EA on the dangling bonds of the surface. The EA/Si device is among the most sensitive organic near-infrared photoelectronic device to date. This work opens up new avenues to overcome the obstacle of the low sensitivity of organic photodetectors, indicating that the EA/Si device has great potential for future applications in flexible photovoltaic devices.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.465495