Study on the performance of ZMO/PbS quantum dot heterojunction solar cells.

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Date: Jan. 1, 2021
From: Solar Energy(Vol. 213)
Publisher: Elsevier Science Publishers
Document Type: Report; Brief article
Length: 359 words

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Abstract :

Keywords PbS quantum dot; Solar cell; Mg-doped ZnO; Temperature; Stability Highlights * FTO/ZMO/PbS-EMII/PbS-EDT/Au solar cells with area of 0.372 cm.sup.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.sup.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.sub.OC and FF. Moreover, it is demonstrated the PbS QDSCs possess noticeably stability for over 30 days of storage in air. Author Affiliation: (a) Beijing Engineering Research Centre of Sustainable Energy and Buildings, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, PR China (b) Key Laboratory of Equipment and Energy-saving Technology on Food & Pharmaceutical Quality Processing, Storage and Transportation, China National Light Industry, Technical Institute of Physics and Chemistry CAS, Beijing 100190, PR China * Corresponding author at: Beijing Engineering Research Centre of Sustainable Energy and Buildings, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, PR China. Article History: Received 10 September 2020; Revised 23 October 2020; Accepted 6 November 2020 Byline: Meibo Xing [xingmeibo@bucea.edu.cn] (a,b,*), Yuyao Wei (a), Ruixiang Wang (a), Zhentao Zhang (b)

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Gale Document Number: GALE|A648932517