High-photosensitivity p-channel organic phototransistors based on a biphenyl end-capped fused bithiophene oligomer
- 저자
- Yong-Young Noh, Dong-Yu Kim, Yuji Yoshida, Kiyoshi Yase, Byung-Jun Jung, Eunhee Lim and Hong-Ku Shim
- 저널명
- Applied Physics Letters, 86, 043501 (2005)
- 년도
- 2005
- Link
- https://doi.org/10.1063/1.1856144 129회 연결
We report highly photosensitive organic phototransistors sOPTsd based on a 2,5-bis-biphenyl-4-yl-thienof3,2-bgthiophene sBPTTd. The measured maximum sensitivity and the ratio of photocurrent to dark current sIph/Idarkd in BPTT OPTs were 82 A/W and 2.03105 under 380 nm UV light with 1.55 mW/cm2, respectively. The prepared OPTs show a photocurrent response similar to the absorption spectrum of BPTT. The major mechanisms for photocurrent ampli®cation in this device were veri®ed from experimental results as photovoltaic sturn-ond and photocurrent effect sturn-offd by a ®tting to theoretic equations.