Super bending-stable flexible colloidal QD photodetector with fast response and near-unity carrier extraction efficiency
- Author
- Yuhao Deng (UGent) , Ezat Kheradmand (UGent) , Chao Pang (UGent) , Abu Bakar Siddik, Jing Bai (UGent) , Itai Lieberman, Pieter Geiregat (UGent) , Dries Van Thourhout (UGent) and Zeger Hens (UGent)
- Organization
- Project
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- Electrically Driven Quantum Dot Lasers, a Fundamental Nanomaterials/Nanophotonics Approach (E-QUAL)
- A Fundamental Study on Infrared Transitions in Quantum Dots - INTRIQATE
- SINGLE ATOMS MATTER – a concerted approach to precision synthesis of nanocrystals
- Ultrafast III–V colloidal quantum dot photodiodes for short-wave infrared light detection and ranging – QUALiDAR
- Nano-Ridge Engineering for Densely Integrated IIIV Lasers Directly Grown on Silicon
- Abstract
- Flexible colloidal quantum dot (QD) optoelectronics apply the superior properties of colloidal QDs to flexible devices, exhibiting unique advantages in the fields of imagers, solar cells, displays, wearable sensors, on-skin electronics, robotics, and bioimaging. Here, we show that colloidal QD photodiodes (QDPDs) with an ultrathin QD absorber layer have record bending stability with 100,000 repetitive bending cycles in QD devices. The QDPDs obtained a high-quality p-n junction with a 1700 rectification ratio. The formation of a Fabry-Perot cavity by the layered stack results in a 3.4-fold enhanced light absorption, while the ultrathin structure ensures a near-unity efficient extraction (97%) of photogenerated charge carriers from the PbS QD film upon illumination with 1330 nm short-wavelength infrared light. Finally, upon suppression of the capacitance effect, the response time of this QDPD can be as short as 20 ns, which is the fastest response for flexible colloidal QDPDs.
- Keywords
- flexible optoelectronics, bending stability, colloidal quantum dots, photodetector, short-waveinfrared
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01JQDWGHY4JCS9DVT6X183F646
- MLA
- Deng, Yuhao, et al. “Super Bending-Stable Flexible Colloidal QD Photodetector with Fast Response and near-Unity Carrier Extraction Efficiency.” ACS APPLIED MATERIALS & INTERFACES, vol. 17, no. 9, 2025, pp. 14243–49, doi:10.1021/acsami.4c21940.
- APA
- Deng, Y., Kheradmand, E., Pang, C., Siddik, A. B., Bai, J., Lieberman, I., … Hens, Z. (2025). Super bending-stable flexible colloidal QD photodetector with fast response and near-unity carrier extraction efficiency. ACS APPLIED MATERIALS & INTERFACES, 17(9), 14243–14249. https://doi.org/10.1021/acsami.4c21940
- Chicago author-date
- Deng, Yuhao, Ezat Kheradmand, Chao Pang, Abu Bakar Siddik, Jing Bai, Itai Lieberman, Pieter Geiregat, Dries Van Thourhout, and Zeger Hens. 2025. “Super Bending-Stable Flexible Colloidal QD Photodetector with Fast Response and near-Unity Carrier Extraction Efficiency.” ACS APPLIED MATERIALS & INTERFACES 17 (9): 14243–49. https://doi.org/10.1021/acsami.4c21940.
- Chicago author-date (all authors)
- Deng, Yuhao, Ezat Kheradmand, Chao Pang, Abu Bakar Siddik, Jing Bai, Itai Lieberman, Pieter Geiregat, Dries Van Thourhout, and Zeger Hens. 2025. “Super Bending-Stable Flexible Colloidal QD Photodetector with Fast Response and near-Unity Carrier Extraction Efficiency.” ACS APPLIED MATERIALS & INTERFACES 17 (9): 14243–14249. doi:10.1021/acsami.4c21940.
- Vancouver
- 1.Deng Y, Kheradmand E, Pang C, Siddik AB, Bai J, Lieberman I, et al. Super bending-stable flexible colloidal QD photodetector with fast response and near-unity carrier extraction efficiency. ACS APPLIED MATERIALS & INTERFACES. 2025;17(9):14243–9.
- IEEE
- [1]Y. Deng et al., “Super bending-stable flexible colloidal QD photodetector with fast response and near-unity carrier extraction efficiency,” ACS APPLIED MATERIALS & INTERFACES, vol. 17, no. 9, pp. 14243–14249, 2025.
@article{01JQDWGHY4JCS9DVT6X183F646,
abstract = {{Flexible colloidal quantum dot (QD) optoelectronics apply the superior properties of colloidal QDs to flexible devices, exhibiting unique advantages in the fields of imagers, solar cells, displays, wearable sensors, on-skin electronics, robotics, and bioimaging. Here, we show that colloidal QD photodiodes (QDPDs) with an ultrathin QD absorber layer have record bending stability with 100,000 repetitive bending cycles in QD devices. The QDPDs obtained a high-quality p-n junction with a 1700 rectification ratio. The formation of a Fabry-Perot cavity by the layered stack results in a 3.4-fold enhanced light absorption, while the ultrathin structure ensures a near-unity efficient extraction (97%) of photogenerated charge carriers from the PbS QD film upon illumination with 1330 nm short-wavelength infrared light. Finally, upon suppression of the capacitance effect, the response time of this QDPD can be as short as 20 ns, which is the fastest response for flexible colloidal QDPDs.}},
author = {{Deng, Yuhao and Kheradmand, Ezat and Pang, Chao and Siddik, Abu Bakar and Bai, Jing and Lieberman, Itai and Geiregat, Pieter and Van Thourhout, Dries and Hens, Zeger}},
issn = {{1944-8244}},
journal = {{ACS APPLIED MATERIALS & INTERFACES}},
keywords = {{flexible optoelectronics,bending stability,colloidal quantum dots,photodetector,short-waveinfrared}},
language = {{eng}},
number = {{9}},
pages = {{14243--14249}},
title = {{Super bending-stable flexible colloidal QD photodetector with fast response and near-unity carrier extraction efficiency}},
url = {{http://doi.org/10.1021/acsami.4c21940}},
volume = {{17}},
year = {{2025}},
}
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