Facile Tuning the Detection Spectrum of Organic Thin Film Photodiode via Selective Exciton Activation.
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.
['Sim|Kyu Min|KM|', 'Yoon|Seongwon|S|', 'Cho|Jangwhan|J|', 'Jang|Min Su|MS|', 'Chung|Dae Sung|DS|http://orcid.org/0000-0003-1313-8298']
photodiode full-color image sensor barrier height organic semiconductor photodetector