Stable and high-efficiency P3CT-Na based MAPbI3 solar cells with a graphene quantum-dots down-converter. (1st September 2021)

• Record Type: Journal Article
• Authors: Thakur, Diksha; Hsieh, Meng-Lin; Chiang, Shou-En; Yen, Yung-Sheng; Liu, Wei-Ren; Hsiung Chang, Sheng
• Is Part Of: Solar energy. Volume 225(2021)
• Page Start: 882
• Page End: 891
• Publication Date: 2021-09-01
• Subjects: Photo-induced degradation -- MAPbI3 solar cells -- Boron-doped graphene quantum dots film -- Down-converter; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2021.07.065
• Languages: English
• ISSNs: 0038-092X

Abstract

Graphical abstract: Highlights: Photo-induced degradation of the MAPbI3 solar cells was investigated. Blue and green photons result in the additional defects in the MAPbI3 thin film. Near-infrared photons result in the thermal annealing effect from the ITO thin film. The use of a BG-QDs:PMMA increases the photo-stability of the MAPbI3 solar cells. Abstract: The photo-induced degradations in the photovoltaic performance of high-efficiency P3CT-Na based CH3 NH3 PbI3 (MAPbI3 ) solar cells were investigated by using a boron-doped graphene quantum dots (BG-QDs):poly(methyl methacrylate) (PMMA) film coated glass substrate or a glass substrate as the light shielding window. With the use of a BG-QDs:PMMA film coated glass substrate, the power conversion efficiency (PCE) of the P3CT-Na based MAPbI3 solar cell slightly decreased from 18.50% to 18.23% under one sun illumination for 20 min. To investigate the photo-induced changes in the MAPbI3 /P3CT-Na/ITO/glass samples with and without the shielding from a BG-QDs:PMMA/glass substrate, the X-ray diffraction patterns, absorbance spectra and photoluminescence spectra are measured and analyzed. It shows that the blue and green photons can increase the defect density in the MAPbI3 thin film and thereby resulting in the irreversible photovoltaic performance. Fortunately, the BG-QDs:PMMA thin film is not only used to shield the high energy photons, but also can be used as an efficient down-converter and thereby resulting in a stable and high-efficiency perovskite solar cell.