Time-Resolved Observation of Organic Light Emitting Diode under Reverse Bias Voltage by Extended Time Domain Reflectometry

LIAO, Weisong; KAINO, Akira; MASHIKO, Tomoaki; KUROMASA, Sou; Sakai, Masatoshi; KUDO, Kazuhiro

doi:10.1587/transele.2022oms0011

Cited by 1 publication

(1 citation statement)

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“…Our extended time-domain reflectometry (ExTDR) framework was first applied to detect the transient impedance of organic thin-film transistors (OTFTs) [5,6] and organic light-emitting diodes (OLEDs). [7] We succeeded in observing the initial carrier injection process from the contact electrode into the organic thin film by applying a gate voltage in OTFT, or hole exhaust process under reverse bias in the OLED. In this study, a derived TDR measurement was applied to observe the initial photocarrier generation process in the OPV with the 10 ns to 200 μs time region.…”

Section: Introductionmentioning

confidence: 99%

Initial Photocarrier Generation Process in Organic Photovoltaics Observed with Light‐Triggered Time‐Domain Reflectometry

Mashiko

Takano

Kaino

et al. 2023

Physica Status Solidi (a)

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Herein, a time‐resolved electrical measurement is developed to observe the transient impedance of organic photovoltaics (OPV) and traced the initial photocarrier generation dynamics with the time region from 10 ns to 190 μs. A light‐triggered time‐domain reflectometry is adopted to observe the initial carrier dynamics in OPV by synchronizing rectangular light pulses from LED with a transient impedance probe pulse. Both the rising and recovery processes of OPV are observed in detail. The time evolution of the photocarrier distribution is calculated based on the diffusion–recombination scheme and is discussed in the initial process of photocarrier generation.

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Section: Introductionmentioning

confidence: 99%