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Solution-processed intermediate-band solar cells with lead sulfide quantum dots and lead halide perovskites

The intermediate-band solar cell (IBSC) with quantum dots and a bulk semiconductor matrix has potential for high power conversion efficiency, exceeding the Shockley-Queisser limit. However, the IBSCs reported to date have been fabricated only by dry process and their efficiencies are limited, becaus...

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Detalles Bibliográficos
Autores principales: Hosokawa, Hiroji, Tamaki, Ryo, Sawada, Takuya, Okonogi, Akinori, Sato, Haruyuki, Ogomi, Yuhei, Hayase, Shuzi, Okada, Yoshitaka, Yano, Toshihiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6327045/
https://www.ncbi.nlm.nih.gov/pubmed/30626874
http://dx.doi.org/10.1038/s41467-018-07655-3
Descripción
Sumario:The intermediate-band solar cell (IBSC) with quantum dots and a bulk semiconductor matrix has potential for high power conversion efficiency, exceeding the Shockley-Queisser limit. However, the IBSCs reported to date have been fabricated only by dry process and their efficiencies are limited, because their photo-absorption layers have low particle density of quantum dots, defects due to lattice strain, and low bandgap energy of bulk semiconductors. Here we present solution-processed IBSCs containing photo-absorption layers where lead sulfide quantum dots are densely dispersed in methylammonium lead bromide perovskite matrices with a high bandgap energy of 2.3 eV under undistorted conditions. We confirm that the present IBSCs exhibit two-step photon absorption via intermediate-band at room temperature by inter-subband photocurrent spectroscopy.