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Photodetectors based on treated CdSe quantum-dot films
Abstract
We demonstrate photodetectors of sandwich geometry active in the visible spectrum in which the active layer is a 200 nm thick film of CdSe quantum dots (QDs). The solution-phase treatment of the QD film with n-butylamine after casting greatly increases the exciton dissociation efficiency and charge-transport properties of the film. Under 110mW∕cm2 illumination with light at λ=514nm, the photocurrent to dark current ratio, Iphoto∕Idark, is 103 at V=0V, and the 3 dB frequency is ∼50kHz. At room temperature, we observe zero-bias external quantum efficiencies (EQE) from 0.08% to 0.23% in the wavelength range λ=350nm to λ=575nm, corresponding to an internal quantum efficiency (IQE) of 0.6±0.1% across the tested spectrum. At V=−6V, EQE ranges from 15% to 24%, corresponding to an IQE of 70±10%.
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Cited by
Solution-processed semiconductors for next-generation photodetectors
García de Arquer, F. P., Armin, A., Meredith, P., & Sargent, E. H. (2017) · Nature Reviews Materials · doi:10.1038/natrevmats.2016.100 · Cited by 1,529
Law, M., Luther, J. M., Song, Q., Hughes, B. K., Perkins, C. L., & Nozik, A. J. (2008) · Journal of the American Chemical Society · doi:10.1021/ja800040c · Cited by 431
Kang, C. H., Dursun, I., Liu, G., Sinatra, L., Sun, X., Kong, M., Pan, J., Maity, P., Ooi, E.-N., Ng, T. K., et al. (2019) · Light: Science & Applications · doi:10.1038/s41377-019-0204-4 · Cited by 329
Sensitive Solution-Processed Bi2S3 Nanocrystalline Photodetectors
Konstantatos, G., Levina, L., Tang, J., & Sargent, E. H. (2008) · Nano Letters · doi:10.1021/nl802600z · Cited by 302
Bidirectional optical signal transmission between two identical devices using perovskite diodes
Bao, C., Xu, W., Yang, J., Bai, S., Teng, P., Yang, Y., Wang, J., Zhao, N., Zhang, W., Huang, W., et al. (2020) · Nature Electronics · doi:10.1038/s41928-020-0382-3 · Cited by 233
Metadata
- Authors
- Oertel, D. C., Bawendi, M. G., Arango, A. C., & Bulović, V.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2005-11-18
- Volume
- 87
- Issue
- 21
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2054592621
- Cited by
- 260
- References
- 0
- FWCI
- 6.05
- Type
- journal article
- Language
- en
- Open access
- closed
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- Oertel, D. C., Bawendi, M. G., Arango, A. C., & Bulović, V. (2005). Photodetectors based on treated CdSe quantum-dot films. Applied Physics Letters. https://doi.org/10.1063/1.2136227
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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