基于稀土配合物的有机光盲型紫外探测器

doi:10.3866/PKU.WHXB201310301

Abstract

Abstract:

Anew type of organic visible-blind ultraviolet (UV) photodetector based on tri(dibenzoylmethane)(4, 7-biphenyl-1,10-phenanthroline)europium (Ⅲ) [Eu(DBM)₃BPhen] as an electron donor and [6,6]-phenyl-C-61-butyric acid methyl ester ([60]PCBM) as an electron acceptor was fabricated. A peak response of 26 mA·W^-1 and external quantum efficiency of 9.1% were obtained under illumination with 360 nm UV light at 2.1 mW·cm^-2. This was because of the high UV absorption of Eu(DBM)₃BPhen and the long lifetime, 300 μs, of Eu³⁺ ions, resulting in high exciton dissociation efficiency. Distinct photoluminescence quenching and photoconductivity of Eu(DBM)₃BPhen were obtained by doping with [60]PCBM. A strong persistent photoconductivity was observed, which could be attributed to low charge carrier transportation and slow release of trapped exciton states in the blend films after the UV light is turned off.

Key words: Organic visible-blind, Ultraviolet photodetector, Persistent photoconductivity

MSC2000:

O644

LI Ling-Liang, ZHANG Fu-Jun, WANG Zi-Xuan, AN Qiao-Shi, WANG Jian, XU Zheng. Organic Visible-Blind Ultraviolet Photodetectors Based on Rare Earth Complex[J].Acta Phys. -Chim. Sin., 2013, 29(12): 2624-2629.

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Organic Visible-Blind Ultraviolet Photodetectors Based on Rare Earth Complex

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