无机纳米颗粒及界面层协同改善倍增型近红外有机光电探测器性能
Inorganic Nanoparticles and Interface Layer Synergistically Improve Performance of Near-infrared Organic Photomultiplication Photodetector
摘要
Abstract
Novel near-infrared organic photodetectors have wide application prospects in biosensing,medical imag-ing,and wearable electronics with the advantages of low cost,solution-spin coating,good biocompatibility,and flexible.Compared with diode organic photodetectors,high sensitive photomultiplication organic photodetectors have attracted enormous attention because of their higher external quantum efficiency(EQE>100%).The mechanism of the photo-multiplication involves a type of carrier being trapped near the electrode,which assists another opposite polarity carri-er tunneling into the active layer from the extra circuit.However,the performances of the device are limited by the number of traps.In this work,inorganic ZnO nanoparticles(NPs)are added into the active layer to enhance the pho-tocurrent of the device through increasing the number of electron traps,and fortunately the dark current density of the device is maintained.It is found that the photocurrent of the device is improved by 7.4 times with optimal 5%ZnO NPs,compared with control device without ZnO NPs,under the reverse bias of-15 V,850 nm illumination.Be-sides,the Al2O3 interface modification layer is further inserted into the device to improve performance of the device.The results show that the Al2O3 based device has bi-direction response for both reverse and forward bias via changing the interface contact characteristics near anode.Ultimately,the device obtains high EQE and R up to 105%and 104 A/W at a broad wavelength range of 380-1 310 nm,applied with a forward bias of 15 V.This work provides a new idea and method for the development of high-sensitivity organic photodetectors.关键词
近红外/光电倍增/有机光电探测器/无机纳米颗粒/界面修饰Key words
near-infrared/photomultiplication/organic photodetectors/inorganic nanoparticles/interface modification分类
数理科学引用本文复制引用
常铭茹,石林林,滑羽璐,冀婷,李国辉,许并社,董海亮,崔艳霞..无机纳米颗粒及界面层协同改善倍增型近红外有机光电探测器性能[J].发光学报,2024,45(6):986-995,10.基金项目
国家自然科学基金(62205235,U21A20496,62174117) （62205235,U21A20496,62174117）
山西省重点研发计划项目(202102150101007) （202102150101007）
山西省自然科学基金(20210302123154,20210302123169) （20210302123154,20210302123169）
山西浙大新材料与化工研究院研发项目(2021SX-FR008,2022SX-TD020) （2021SX-FR008,2022SX-TD020）
中央引导地方科技发展资金项目(YDZJSX20231A010,YDZJSX2021A012) （YDZJSX20231A010,YDZJSX2021A012）
吕梁市人才引进专项(Rc2020206,Rc2020207)Supported by National Natural Science Foundation of China(62205235,U21A20496,62174117) （Rc2020206,Rc2020207）
Key Research and Develop-ment Program of Shanxi Province(202102150101007) （202102150101007）
Natural Science Foundation of Shanxi Province(20210302123154,20210302123169) （20210302123154,20210302123169）
Research Program Supported by Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(2021SX-FR008,2022SX-TD020) （2021SX-FR008,2022SX-TD020）
the Central Government Guides Local Funds for Scientific and Technological Development(YDZJSX20231A010,YDZJSX2021A012) （YDZJSX20231A010,YDZJSX2021A012）
Introduction of Talents Special Project of Lvliang City(Rc2020206,Rc2020207) （Rc2020206,Rc2020207）
