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Organic single-crystal phototransistor with unique wavelength-detection characteristics

具有独特波长检测特性的有机单晶光电晶体管

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Abstract

Organic phototransistors based on high-quality 2,8-dichloro-5,11-dihexyl-indolo[3,2-b]carbazo (CHICZ) single crystals show the highest photoresponsivity of 3×103 A W−1, photosensitivity of 2×104 and the detectivity can achieve 8.4×1014 Jones. We also discovered good linear dependence of log(photosensitivity) versus the wavelength when the devices were illuminated with a series of sameintensity but different-wavelength lights. The organic phototransistors based on CHICZ single crystal have potential applications in wavelength-detection.

摘要

高质量的2, 8 - 二氯- 5, 1 1 - 二己基- 吲哚[ 3, 2 -b] 咔唑(CHICZ)单晶被应用于光电晶体管, 并表现出高性能的光响应度 (Rmax=3×103 A W−1)和光敏感性(Pmax=2×104 以及Dmax*=8.4×1014 Jones). 此外, 我们首次发现当这些器件被一系列相同强度但不同波长的 光照亮时, 光敏度的对数与波长呈现非常好的线性关系. 这一现象为拓展有机光控晶体管在波长检测中的应用提供了新视角.

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Acknowledgements

The authors acknowledge financial support from the Ministry of Science and Technology of China (2017YFA0204503 and 2016YFB0401100), the National Natural Science Foundation of China (51725304, 51633006, 51703159 and 51733004), and the Strategic Priority Research Program (XDB12030300) of the Chinese Academy of Sciences.

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Correspondence to Huanli Dong  (董焕丽).

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Mengxiao Hu obtained her BSc degree from Qingdao University in 2016. Now she is a master student at the Department of Chemistry, Capital Normal University (CNU), China. Her current research focuses on organic optoelectronic functional devices.

Huanli Dong is a Professor of the Institute of Chemistry, Chinese Academy of Sciences (CAS). She received her PhD degree from the Institute in 2009 after she got her MSc degree from Fujian Institute of Research on the Structure of Material, CAS, in 2006. Her current research focuses on organic/polymer optoelectronic materials and devices, including molecular structure design, solid state structure modulation as well as device physics.

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Hu, M., Liu, J., Zhao, Q. et al. Organic single-crystal phototransistor with unique wavelength-detection characteristics. Sci. China Mater. 62, 729–735 (2019). https://doi.org/10.1007/s40843-018-9369-5

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