PREPARATION OF HIGH EFFICIENCY TIO2/PBS QUANTUM DOT HETEROJUNCTION SOLAR CELLS BY SINGLE-STEP METHOD

Xing Meibo; Ding Xianzhe; Jing Dongliang; Li Zirui; Wang Ruixiang

doi:10.19912/j.0254-0096.tynxb.2021-0738

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 19-24. DOI: 10.19912/j.0254-0096.tynxb.2021-0738

PREPARATION OF HIGH EFFICIENCY TIO₂/PBS QUANTUM DOT HETEROJUNCTION SOLAR CELLS BY SINGLE-STEP METHOD

Xing Meibo, Ding Xianzhe, Jing Dongliang, Li Zirui, Wang Ruixiang

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Abstract

To fabricate high efficiency quantum dot solar cells, the absorbing p-type PbS quantum dots was prepared on n-type TiO₂ by simplified single-step spin coating method. In order to confirm the effectiveness of the single-step method and obtain high efficiency devices, QDSCs with two different concentrations of PbS QDs are prepared and their performance is investigated. It is demonstrated that the device with lower QD loading achieved higher power conversion efficiency （PCE） of 9.08%, with open-circuit voltage （V_OC） of 0.570 V, short-circuit current density （J_SC） of 29.6 mA/cm², fill factor （FF） of 0.539, under simulated AM1.5 solar illuminations. The experiment results verify feasibility and reliability of the single-step method. Compared with traditional layer-by-layer （LBL） method, the single-step method demonstates merits of simpler process, less material consumption, and higher surface quality. Consequently, it is potential to apply single-step for quantum dot solar cell mass production.

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solar cells / semiconductor quantum dots / solar cell efficiency / single-step / QD concentration

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Xing Meibo, Ding Xianzhe, Jing Dongliang, Li Zirui, Wang Ruixiang. PREPARATION OF HIGH EFFICIENCY TIO₂/PBS QUANTUM DOT HETEROJUNCTION SOLAR CELLS BY SINGLE-STEP METHOD[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 19-24 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0738

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