Study of conductive polymer PEDOT: PSS for infrared thermal detection

Li, Jingwen; Li, Zhenhua; Wang, Jicheng; Chen, Xuekang

doi:10.1364/ome.9.004474

Cited by 12 publications

(13 citation statements)

References 35 publications

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“…The definition of TCR , is TCR = R 2 − R 1 ( T 2 − T 1 ) R 1 = d R d T 1 R where R 1 and R 2 represent the resistance of the device measured at T 1 and T 2 , respectively. Typically, the sign of TCR is negative in semiconducting materials and positive in metallic materials, , and a high TCR is a prerequisite for an efficient bolometer.…”

Section: Resultsmentioning

confidence: 99%

“…Having clarified the roles of intra-band and sub-bandgap transitions in the organic MWIR/LWIR response, next, we examined the series of BHJs in Figure to correlate their TCRs to electronic properties at the mobility edge and sub-bandgap trap states. Despite the diversity of organic semiconductors, prior work on organic MWIR/LWIR detectors has mostly utilized poly(3,4-ethylenedioxythiophene) polystyrene sulfonate PEDOT:PSS composites − as the active material.…”

Section: Resultsmentioning

confidence: 99%

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Contribution of Sub-Gap States to Broadband Infrared Response in Organic Bulk Heterojunctions

Park

Vella

et al. 2022

ACS Appl. Mater. Interfaces

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This work studied a series of infrared detectors comprised of organic bulk heterojunctions to explain the origin of their broadband spectral response from the visible to the infrared spanning 1 to 8 μm and the transition from photonic to bolometric operation. Through comparisons of the detector current and the sub-bandgap density of states, the mid-and long-wave infrared response was attributed to charge trap-and-release processes that impact thermal charge generation and the activation energy of charge mobility. We further demonstrate how the sub-bandgap characteristics, mobility activation energy, and effective bandgap are key design parameters for controlling the device temperature coefficient of resistance, which reached up to −7%/K, better than other thinfilm materials such as amorphous silicon and vanadium oxide.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Contribution of Sub-Gap States to Broadband Infrared Response in Organic Bulk Heterojunctions

Park

Vella

et al. 2022

ACS Appl. Mater. Interfaces

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“…The influence of temperature on the electrical conductivity of PEDOT:PSS films was evaluated by measuring their resistance in the temperature range of 15-70 • C. The results of the measurements are shown in Figure 12. The transport of charge carriers in PEDOT:PSS occurs by thermally assisted hopping among localized states at different energies [47,48]. The characteristic hopping length is a function of the distance between two localized states and the difference in associated energies.…”

Section: Resultsmentioning

confidence: 99%

Electrical Characterization of Thin PEDOT:PSS Films on Alumina and Thiol–Ene Substrates

et al. 2021

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Transparent polymer layers that heal minor scratches and maintain the optical properties of the devices for a long time are highly desirable in optoelectronics. This paper presents the results of the electrical characterization of thin PEDOT:PSS films on the novel, optically transparent thiol–ene substrates capable of healing scratches under room-temperature conditions. Electrical properties of the PEDOT:PSS films deposited on the conventional alumina ceramic substrates were also tested for comparative purposes. This study demonstrated that the substrate can have a significant effect on the electrical properties of PEDOT:PSS films, and the electrical resistance of the films on thiol–ene substrates is not as stable as on alumina ceramics. However, the changes in electrical resistance of the films on thiol–ene are small enough over a sufficiently wide range of operating temperatures and relative humidities and allow the application of such bilayers in various polymeric optoelectronic devices.

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“…Poly(3,4-ethylenedioxythiophene) polystyrenesulfonate (PEDOT:PSS) is a well-known conductive polymer due to its low thermal conductivity, high conductivity, and decent temperature coefficient of resistance at room temperature . Li et al designed a novel bolometer based on PEDOT:PSS, where the PEDOT: PSS layer was used simultaneously as the thermal sensitive material, infrared absorption layer, thermal insulation layer, and the electrical connection material . This design shows the versatility of this conducting polymer, which would dramatically reduce the complexity of the bolometer structure.…”

Section: Infrared Detector Designsmentioning

confidence: 99%

Infrared Light Detection Technology Based on Organics

Sui

et al. 2023

ACS Appl. Electron. Mater.

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This decade has seen rapid developments in infrared light sensing and imaging, utilizing innovative materials and deliberate structural designs. Organic semiconducting materials are promising in the next-generation infrared sensing applications due to their unique properties including solution processability, tunable optoelectronic property, and biocompatibility. This Spotlight aims to provide a snapshot of the recent advances in organic infrared light detection technology, specifically for wavelengths beyond 1000 nm, focusing on performance enhancements and new function realizations. Several innovative proof-of-concept demonstrations illustrate the benefits of the rapidly developing organic infrared technology. Finally, we discuss the challenges and perspectives of organic infrared technology.

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Study of conductive polymer PEDOT: PSS for infrared thermal detection

Cited by 12 publications

References 35 publications

Contribution of Sub-Gap States to Broadband Infrared Response in Organic Bulk Heterojunctions

Contribution of Sub-Gap States to Broadband Infrared Response in Organic Bulk Heterojunctions

Electrical Characterization of Thin PEDOT:PSS Films on Alumina and Thiol–Ene Substrates

Infrared Light Detection Technology Based on Organics

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