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Improve the performance of MAPbI-based solar cells by adding PbS QD absorber layer

Journal of the Korean Physical Society, ISSN: 1976-8524, Vol: 83, Issue: 4, Page: 301-309
2023
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Article Description

In the present study, a reference solar cell with ITO/ZnO/MAPbI/Spiro-OMeTAD/Ag structure with one absorber layer (MAPbI perovskite) was simulated and simulation results were compared with real experimental results. Then, to improve the performance of the reference cell, a layer of lead sulfide quantum dot (PbS QD) was used as the second absorber layer to produce a double-absorber solar cell. It was found that by inserting the PbS QD layer between MAPbI and Spiro-OMeTAD, the efficiency of reference perovskite-based solar cells increases from 12.65 to 18.46% regarding the enhancement in current density (J) of the short circuit from 19.95 mA/cm to 30.45 mA/cm. Using a QD absorber beside the perovskite layer could be an effective approach to increase light absorption and photo-carrier generation in the device. For this double-absorber device, the power conversion efficiency, filling factor (FF), and open-circuit voltage (V) of 18.46%, 67%, and 0.91 V were obtained under 1.5 AM illumination, and all properties were discussed.

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