The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.
Slow cooling and highly efficient extraction of hot carriers in colloidal perovskite nanocrystals
Open accessAbstract
Hot-carrier solar cells can overcome the Shockley-Queisser limit by harvesting excess energy from hot carriers. Inorganic semiconductor nanocrystals are considered prime candidates. However, hot-carrier harvesting is compromised by competitive relaxation pathways (for example, intraband Auger process and defects) that overwhelm their phonon bottlenecks. Here we show colloidal halide perovskite nanocrystals transcend these limitations and exhibit around two orders slower hot-carrier cooling times and around four times larger hot-carrier temperatures than their bulk-film counterparts. Under low pump excitation, hot-carrier cooling mediated by a phonon bottleneck is surprisingly slower in smaller nanocrystals (contrasting with conventional nanocrystals). At high pump fluence, Auger heating dominates hot-carrier cooling, which is slower in larger nanocrystals (hitherto unobserved in conventional nanocrystals). Importantly, we demonstrate efficient room temperature hot-electrons extraction (up to ∼83%) by an energy-selective electron acceptor layer within 1 ps from surface-treated perovskite NCs thin films. These insights enable fresh approaches for extremely thin absorber and concentrator-type hot-carrier solar cells.
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Cited by
The Evolution of Quantum Confinement in CsPbBr3 Perovskite Nanocrystals
Butkus, J., Vashishtha, P., Chen, K., Gallaher, J. K., Prasad, S. K. K., Metin, D. Z., Laufersky, G., Gaston, N., Halpert, J. E., & Hodgkiss, J. M. (2017) · Chemistry of Materials · doi:10.1021/acs.chemmater.7b00478 · Cited by 362
Origin of the Size-Dependent Stokes Shift in CsPbBr 3 Perovskite Nanocrystals
Brennan, M. C., Herr, J. E., Nguyen-Beck, T. S., Zinna, J., Draguta, S., Rouvimov, S., Parkhill, J., & Kuno, M. (2017) · Journal of the American Chemical Society · doi:10.1021/jacs.7b05683 · Cited by 326
Cation-Dependent Hot Carrier Cooling in Halide Perovskite Nanocrystals
Chen, J., Messing, M. E., Zheng, K., & Pullerits, T. (2019) · Journal of the American Chemical Society · doi:10.1021/jacs.8b11867 · Cited by 317
ABX3 Perovskites for Tandem Solar Cells
Anaya, M., Lozano, G., Calvo, M. E., & Míguez, H. (2017) · Joule · doi:10.1016/j.joule.2017.09.017 · Cited by 286
Metadata
- Authors
- Li, M., Bhaumik, S., Goh, T. W., Kumar, M. S., Yantara, N., Grätzel, M., Mhaisalkar, S., Mathews, N., & Sum, T. C.
- Venue
- Nature Communications
- Published
- 2017-02-08
- Volume
- 8
- Issue
- 1
- Pages
- 14350-14350
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2587745149
- Cited by
- 434
- References
- 28
- FWCI
- 16.11
- Type
- journal article
- Language
- en
- Open access
- gold
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