High-photosensitivity p-channel organic phototransistors based on a biphenyl end-capped fused bithiophene oligomer
High-photosensitivity p-channel organic phototransistors based on a biphenyl end-capped fused bithiophene oligomer
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DOI：
10.1063/1.1856144
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发表时间：
2005-01-24
影响因子：
4
通讯作者：
Shim, HK
中科院分区：
文献类型：
--
作者：
Noh, YY;Kim, DY;Shim, HK
我们报道了基于2，5-二联苯-4-基-硫代并[3，2-b]噻吩基(BPTT)的高光敏有机光电晶体管(OPTT)。在波长为380 nm、功率为1.55 mW/cm(2)的紫外光照射下，BPTT OPTS的最大灵敏度为82 A/W，光电流与暗电流之比为2.0×10(5)。制备的OPTS显示出与BPTT吸收光谱相似的光电流响应。通过对理论方程的拟合，从实验结果中验证了该器件中光电流放大的主要机理为光伏效应(开启)和光电流效应(关断)。(C)2005年美国物理研究所。
We report highly photosensitive organic phototransistors (OPTs) based on a 2,5-bis-biphenyl-4-yl-thieno[3,2-b]thiophene (BPTT). The measured maximum sensitivity and the ratio of photocurrent to dark current (I-ph/I-dark) in BPTT OPTs were 82 A/W and 2.0x10(5) under 380 nm UV light with 1.55 mW/cm(2), respectively. The prepared OPTs show a photocurrent response similar to the absorption spectrum of BPTT. The major mechanisms for photocurrent amplification in this device were verified from experimental results as photovoltaic (turn-on) and photocurrent effect (turn-off) by a fitting to theoretic equations. (C) 2005 American Institute of Physics.