Facile Tuning the Detection Spectrum of Organic Thin Film Photodiode via Selective Exciton Activation

ACS Applied Materials & Interfaces
Kyu Min SimDae Sung Chung

Abstract

Here, we introduce a method of tuning the high-detectivity spectra of the organic photodiode (OPD) to fabricate a thin-film filter-less full-color image sensor. The strategically introduced PIN junction enables a selective activation of excitons generated from the photons with low extinction coefficient in the active layer such that the separated holes/electrons can contribute to the external current. In addition, we show that a well-defined PIN junction blocks the injection of nonallowed charge carriers, leading to very low dark current and near-ideal diode characteristics. Consequently, the high specific detectivity over 1.0 × 1012 Jones are observed from R/G/B-selective thin-film OPDs.

References

Nov 8, 2012·Nature Communications·Daniela BaierlPaolo Lugli
Mar 14, 2013·Advanced Materials·Kang-Jun BaegYong-Young Noh
Nov 21, 2014·Nature Communications·Letian DouYang Yang
Feb 28, 2015·Nature Communications·Ardalan ArminPaul Meredith
Jun 17, 2015·Scientific Reports·Boyuan QiJizheng Wang
Jan 19, 2016·Advanced Materials·Liang ShenJinsong Huang
Apr 26, 2016·Advanced Materials·Ross D Jansen-van VuurenPaul Meredith

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