材料科学
响应度
窄带
光电探测器
光电子学
光活性层
比探测率
暗电流
吸收(声学)
光学
能量转换效率
复合材料
聚合物太阳能电池
物理
作者
Jia Jiao,Ye Zhang,Linlin Shi,Guohui Li,Ting Ji,Wenyan Wang,Rong Wen,Yuying Hao,Kaiying Wang,Furong Zhu,Yanxia Cui
标识
DOI:10.1002/adom.202203132
摘要
Abstract Narrowband‐response organic photodetectors with high responsivity are widely demanded in areas of substance detection, industry automation, smart wearable devices, etc. Photomultiplication‐type organic photodetectors (PM‐OPDs) with high responsivity usually have a broadband photoresponse due to the broadband absorption nature of the photoactive materials. In this work, effort is made to develop a high‐performance filterless narrowband PM‐OPD using the charge injection narrowing (CIN) effect. A 0.8 nm thick Al 2 O 3 interlayer is used to mitigate the dark current density ( J D ) in the narrowband PM‐OPD, prepared using a 2.8 µm thick blend layer of P3HT:[6,6]‐phenyl‐C 70 ‐butyric acid methyl ester (PC 70 BM), achieving a peak responsivity of 1334 A W −1 at 650 nm, with a full‐width at half‐maximum of 40 nm. The narrowband PM‐OPD also possesses an impressive high specific detectivity of 9.73 × 10 13 Jones. It is shown that the use of a 0.8 nm thick Al 2 O 3 interlayer significantly suppresses the J D , creating a high energy barrier at the anode/photoactive interface and achieving a narrowband photoresponse behavior due to the CIN effect. The results of this work provide an exciting option for a variety of applications for OPDs with low cost, flexibility, and high sensitivity.
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