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

ABSTRACT: 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.

SUBMITTER: Hosokawa H

PROVIDER: S-EPMC6327045 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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

Hosokawa Hiroji H Tamaki Ryo R Sawada Takuya T Okonogi Akinori A Sato Haruyuki H Ogomi Yuhei Y Hayase Shuzi S Okada Yoshitaka Y Yano Toshihiro T

Nature communications 20190110 1

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 contai ...[more]

PMID: 30626874

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