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Organic photodetector with built-in amplification for the detection of visible light with low optical power

Journal Article · · Organic Electronics
 [1];  [2];  [2];  [2]
  1. Georgia Institute of Technology, Atlanta, GA (United States); Georgia Institute of Technology
  2. Georgia Institute of Technology, Atlanta, GA (United States)
We report on an organic-based photodetector that integrates a dual-gate organic thin-film transistor (DG-OTFT) with an organic photodiode (OPD) to produce a device with a high effective responsivity at low optical power and video-rate compatible response. In this device, the OPD operates in photovoltaic mode, instead of the commonly used photoconductive mode, to modulate one of the gate voltages of the DG-OTFT. Effective responsivity values of 10 A W–1 are measured at optical power values lower than 10 nW at 635 nm. Here, modeling of the operation of this new photodetector suggests that effective responsivity values up to 105 A W–1 can be achieved at optical powers of 1 nW using current printing technology and state-of-the-art organic semiconductors.
Research Organization:
Georgia Tech Research Corporation, Atlanta, GA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003921
OSTI ID:
1763445
Alternate ID(s):
OSTI ID: 1780440
Journal Information:
Organic Electronics, Journal Name: Organic Electronics Vol. 90; ISSN 1566-1199
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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