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

Title
Facile Tuning the Detection Spectrum of Organic Thin Film Photodiode via Selective Exciton Activation
Authors
Sim, Kyu MinYoon, Seong WonCho, Jang WhanJang, Min SuChung, Dae Sung
DGIST Authors
Chung, Dae Sung
Issue Date
2018-03
Citation
ACS Applied Materials and Interfaces, 10(10), 8405-8410
Type
Article
Article Type
Article
Keywords
Chemical activationExcitonsImage sensorsPhotodetectorsPhotodiodesSemiconducting organic compoundsSemiconductor junctionsBarrier heightsExtinction coefficientsFull color imagesOrganic photodiodesOrganic thin filmsSelective activationSpecific detectivityThin film filtersThin films
ISSN
1944-8244
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. © 2018 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/6151
DOI
10.1021/acsami.8b01437
Publisher
American Chemical Society
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringPolymer Energy Materials Lab1. Journal Articles


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