An organic phototransistor with an ultrahigh gain of 1.1 × 107 is demonstrated, which employs a highly aligned dioctylbenzothienobenzothiophene (C8-BTBT) polycrystalline film as the photoactive layer. This high photodetecting gain reaches the parity of photomultiplier tubes but with tens of times smaller driving voltage. This low noise detector has a noise equivalent power of 14 pW cm−2.
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Yuan et al. (2015) studied this question.
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