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Solution-processed Intermediate-Band Solar Cells With Lead Sulfide Quantum Dots and Lead Halide Perovskites

Solution-processed Intermediate-Band Solar Cells With Lead Sulfide Quantum Dots and Lead Halide Perovskites

Hiroji Hosokawa, Ryo Tamaki, Takuya Sawada, Akinori Okonogi, Haruyuki Sato, Yuhei Ogomi, Shuzi Hayase, Yoshitaka Okada, Toshihiro Yano

Nat Commun. 2019 Jan 10;10(1):43.

PMID: 30626874

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS72748	Methylammonium bromide solution			Price

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