Study on the performance of ZMO/PbS quantum dot heterojunction solar cells. (1st January 2021)

• Record Type: Journal Article
• Authors: Xing, Meibo; Wei, Yuyao; Wang, Ruixiang; Zhang, Zhentao
• Is Part Of: Solar energy. Volume 213(2021)
• Page Start: 53
• Page End: 58
• Publication Date: 2021-01-01
• Subjects: PbS quantum dot -- Solar cell -- Mg-doped ZnO -- Temperature -- Stability; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2020.11.023
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: FTO/ZMO/PbS-EMII/PbS-EDT/Au solar cells with area of 0.372 cm 2 was fabricated. Effect of PbS active layer thickness on the photovoltaic performance was studied. Temperature dependent characteristics of PbS solar cells were studied. The solar cell has 12% power conversion efficiency. PbS solar cells possessed stability for over 30 days of storage in air. Abstract: In this work, the Mg-doped ZnO (ZMO)/Lead sulfide (PbS) quantum dot (QD) heterojunction solar cells are fabricated via layer-by-layer spin-coating method. The quantum dot solar cells (QDSCs) with structure of FTO/ZMO/PbS-EMII/PbS-EDT/Au and relatively larger area of 0.372 cm 2 are prepared in ambient atmosphere. The effect of PbS active layer thickness on the photovoltaic performance of PbS QDSCs is investigated under room temperature of 293 K. It is concluded that seven spin-coating cycles of PbS active layers is the best choice for the device, and the cell with that achieves a power conversion efficiency (PCE) of 9.46%. Furthermore, the temperature dependent characteristics of PbS QDSCs are studied. It is exhibited that the power efficiency improves as the device temperature increases first then shows a decreasing trend as the temperature substantially rises. As a result, a highest PCE of 12% is shown at the working temperature of 273 K due to higher V OC and FF . Moreover, it is demonstrated the PbS QDSCs possess noticeably stability for over 30 days of storage in air.