Highly sensitive polymer photodetectors with a wide spectral response range

doi:10.1088/1674-1056/26/1/018201

中国物理B ›› 2017, Vol. 26 ›› Issue (1): 18201-018201.doi: 10.1088/1674-1056/26/1/018201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Highly sensitive polymer photodetectors with a wide spectral response range

Mile Gao(高米勒), Wenbin Wang(王文斌), Lingliang Li(李凌亮), Jianli Miao(苗建利), Fujun Zhang(张福俊)

Key Laboratory of Luminescence and Optical Information of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China

收稿日期:2016-08-05 修回日期:2016-10-31 出版日期:2017-01-05 发布日期:2017-01-05
通讯作者: Fujun Zhang E-mail:fjzhang@bjtu.edu.cn
基金资助:
Project supported by the Fundamental Research Funds for the Central Universities of China (Grant No. 2014JBZ017) and the National Natural Science Foundation of China (Grant Nos. 61377029 and 61675017).

Highly sensitive polymer photodetectors with a wide spectral response range

Mile Gao(高米勒), Wenbin Wang(王文斌), Lingliang Li(李凌亮), Jianli Miao(苗建利), Fujun Zhang(张福俊)

Key Laboratory of Luminescence and Optical Information of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China

Received:2016-08-05 Revised:2016-10-31 Online:2017-01-05 Published:2017-01-05
Contact: Fujun Zhang E-mail:fjzhang@bjtu.edu.cn
Supported by:
Project supported by the Fundamental Research Funds for the Central Universities of China (Grant No. 2014JBZ017) and the National Natural Science Foundation of China (Grant Nos. 61377029 and 61675017).

摘要/Abstract

摘要： A series of highly sensitive polymer photodetectors (PPDs) was fabricated with P3HT_100-x:PBDT-TS1_x:PC₇₁BM₁ as the active layers, where x represents the PBDT-TS1 doping weight ratio in donors. The response range of PPDs can cover from the UV to near-infrared regions by adjusting the PBDT-TS1 doping weight ratio. The best external quantum efficiency (EQE) values of ternary PPDs with P3HT:PBDT-TS1:PC₇₁BM (50:50:1 wt/wt/wt) as the active layers reach 830%, 720%, and 330% under 390-, 625-, and 760-nm light illumination and -10 V bias, respectively. The large EQE values indicate that the photodetectors utilise photomultiplication (PM). The working mechanism of PM-type PPDs can be attributed to interfacial trap-assisted hole tunnelling injection from the external circuit under light illumination. The calculated optical field and photogenerated electron volume density in the active layers can well explain the EQE spectral shape as a function of the PBDT-TS1 doping weight ratio in donors.

关键词: conducting polymers, photodetectors, photomultiplication

Abstract: A series of highly sensitive polymer photodetectors (PPDs) was fabricated with P3HT_100-x:PBDT-TS1_x:PC₇₁BM₁ as the active layers, where x represents the PBDT-TS1 doping weight ratio in donors. The response range of PPDs can cover from the UV to near-infrared regions by adjusting the PBDT-TS1 doping weight ratio. The best external quantum efficiency (EQE) values of ternary PPDs with P3HT:PBDT-TS1:PC₇₁BM (50:50:1 wt/wt/wt) as the active layers reach 830%, 720%, and 330% under 390-, 625-, and 760-nm light illumination and -10 V bias, respectively. The large EQE values indicate that the photodetectors utilise photomultiplication (PM). The working mechanism of PM-type PPDs can be attributed to interfacial trap-assisted hole tunnelling injection from the external circuit under light illumination. The calculated optical field and photogenerated electron volume density in the active layers can well explain the EQE spectral shape as a function of the PBDT-TS1 doping weight ratio in donors.

Key words: conducting polymers, photodetectors, photomultiplication

中图分类号: (Conducting polymers)

82.35.Cd

85.60.Gz (Photodetectors (including infrared and CCD detectors)) 85.60.Ha (Photomultipliers; phototubes and photocathodes)

高米勒, 王文斌, 李凌亮, 苗建利, 张福俊. Highly sensitive polymer photodetectors with a wide spectral response range[J]. 中国物理B, 2017, 26(1): 18201-018201.

Mile Gao(高米勒), Wenbin Wang(王文斌), Lingliang Li(李凌亮), Jianli Miao(苗建利), Fujun Zhang(张福俊). Highly sensitive polymer photodetectors with a wide spectral response range[J]. Chin. Phys. B, 2017, 26(1): 18201-018201.

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Highly sensitive polymer photodetectors with a wide spectral response range

Highly sensitive polymer photodetectors with a wide spectral response range

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