Low bandgap donor-acceptor-donor-based TPA-azaBODIPY-TPA small molecule for flexible near-infrared organic photodetectors

Gurudutt Bhat; Marcin Kielar; Mahnaz Gholami; Pankaj Sah; Ajay Pandey; Prashant Sonar

doi:10.1117/12.2677285

28 September 2023 Low bandgap donor-acceptor-donor-based TPA-azaBODIPY-TPA small molecule for flexible near-infrared organic photodetectors

Gurudutt Bhat, Marcin Kielar, Mahnaz Gholami, Pankaj Sah, Ajay Pandey, Prashant Sonar

Author Affiliations +

Proceedings Volume 12661, Organic and Hybrid Sensors and Bioelectronics XVI; 1266107 (2023) https://doi.org/10.1117/12.2677285
Event: SPIE Organic Photonics + Electronics, 2023, San Diego, California, United States

Conference Poster

Abstract

Organic photodetectors (OPDs) hold great promise for use in flexible electronics as they can be designed on substrates featuring various shapes and using cost-effective solution-processed methods. Organic conjugated materials offering two or more distinct optoelectronic functions are especially appealing here as they provide multifunctionality while also retaining the ease of fabrication and low-cost advantage. One such material is TPA-azaBODIPY-TPA that has been shown to feature ideal charge transfer properties and excitation energy levels. In our recent work, we demonstrated the versatile nature of this material acting as either a charge transport interlayer in perovskite solar cells, or as a light-absorbing layer in OPDs. TPA-azaBODIPY-TPA-based solar cellsshowed a 60 % increase in power conversion efficiency when compared to a control device using a conventional interlayer PEDOT:PSS. Having also demonstrated the successful utilization of TPA-azaBODIPY-TPA in OPDs manufactured on glass substrates, we further explore its applications in the design and fabrication of flexible OPDs for near-infrared sensing. Fabricated devices on flexible substrates show a near-infrared spectral responsivity of 49 mA W-1 at 730 nm, a high linear dynamic range of 110 dB and fast temporal responses below 100 μs. With robust thermal stability as well as excellent solubility and processability, TPA-azaBODIPY-TPA is found to be perfect candidate for the next-generation of smart optoelectronic flexible devices.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Gurudutt Bhat, Marcin Kielar, Mahnaz Gholami, Pankaj Sah, Ajay Pandey, and Prashant Sonar "Low bandgap donor-acceptor-donor-based TPA-azaBODIPY-TPA small molecule for flexible near-infrared organic photodetectors", Proc. SPIE 12661, Organic and Hybrid Sensors and Bioelectronics XVI, 1266107 (28 September 2023); https://doi.org/10.1117/12.2677285

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