Photovoltage Reversal in Organic Optoelectronic Devices with Insulator-Semiconductor Interfaces.
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ABSTRACT: Photoinduced space-charges in organic optoelectronic devices, which are usually caused by poor mobility and charge injection imbalance, always limit the device performance. Here we demonstrate that photoinduced space-charge layers, accumulated at organic semiconductor-insulator interfaces, can also play a role for photocurrent generation. Photocurrent transients from organic devices, with insulator-semiconductor interfaces, were systematically studied by using the double-layer model with an equivalent circuit. Results indicated that the electric fields in photoinduced space-charge layers can be utilized for charge generation and can even induce a photovoltage reversal. Such an operational process of light harvesting would be promising for photoelectric conversion in organic devices.
SUBMITTER: Hu L
PROVIDER: S-EPMC6163970 | biostudies-literature |
REPOSITORIES: biostudies-literature
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