Structural, optical and excitonic properties of MAxCs1-xPb(IxBr1-x)3 alloy thin films and their application in solar cells

The structural, optical and excitonic characteristics of MAxCs1-xPb(IxBr1-x)3 crystal thin films were investigated by using the X-ray diffraction patterns, scanning electron microscopic images, absorbance spectra and photoluminescence (PL) spectra. The time-dependent PL spectra shows that the MA0.8C...

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Veröffentlicht in:	Solar energy materials and solar cells 2020-06, Vol.210, p.110478, Article 110478
Hauptverfasser:	Chang, Sheng Hsiung, Tseng, Pin-Chia, Chiang, Shou-En, Wu, Jia-Ren, Chen, Yan-Ta, Chen, Ching-Ju, Yuan, Chi-Tsu, Chen, Sheng-Hui
Format:	Artikel
Sprache:	eng
Schlagworte:	Crystal structure Diffraction patterns Electromagnetic absorption Energy conversion efficiency Optical properties Perovskites Photoluminescence Photons Photovoltaic cells Scanning electron microscopy Solar cells Spectra Thin films Time dependence X-ray diffraction
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Zusammenfassung:	The structural, optical and excitonic characteristics of MAxCs1-xPb(IxBr1-x)3 crystal thin films were investigated by using the X-ray diffraction patterns, scanning electron microscopic images, absorbance spectra and photoluminescence (PL) spectra. The time-dependent PL spectra shows that the MA0.8Cs0.2Pb(I0.8Br0.2)3 crystal thin film is a photo-stable light absorbing material, which results in an efficient and stable perovskite solar cell without the additional encapsulation. The highest power conversion efficiency (PCE) of MA0.8Cs0.2Pb(I0.8Br0.2)3 solar cells is 10.02%. In addition, the PCE decreases slowly toward a stable value (5.71%) for more than 120 days under moderate environment conditions (55–60 RH%).
ISSN:	0927-0248
DOI:	10.1016/j.solmat.2020.110478