ACS Applied Materials & Interfaces · 2015 · 156 citations · 27 references
EngineeringMaterials EngineeringMaterials ScienceElectronic MaterialsOptoelectronicsSemiconductor MaterialsConducting PolymersOptoelectronic MaterialsOrganic SemiconductorsPhotodetectorsPhotovoltaic DevicesSolar CellsExternal Quantum EfficiencyOrganic PhotodetectorsOrganic Photovoltaic CellsOrganic PhotovoltaicsOrganic Solar CellsPhotodetector MaterialsQuantum EfficiencyTraps
A smart strategy is reported to obtain photomultiplication (PM) type polymer photodetectors (PPDs) based on poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) which are commonly used in polymer solar cells. The PPDs with 1 wt % PC61BM exhibit a champion EQE of 37,500% under 625 nm illumination with an intensity of 8.87 μW cm(-2) at -19 V bias. The PM phenomenon of PPDs with rather low PC61BM doping ratios should be attributed to the enhanced hole tunneling injection assisted by trapped electrons in PC61BM near the Al cathode, which can be completely demonstrated from (i) turning distribution of electron traps by changing P3HT:PC61BM doping weight ratios from 200:1 to 1:1; (ii) adjusting interfacial barrier width by inserting LiF layer between the active layer and the Al cathode.
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An Ultraviolet‐to‐NIR Broad Spectral Nanocomposite Photodetector with Gain
Rui Dong, Cheng Bi, Qingfeng Dong et al. · Advanced Optical Materials · 2014 · 218 citations
Long Chen, Yibin Jiang, Han Nie et al. · ACS Applied Materials & Interfaces · 2014 · 125 citations