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Yeganegi Z, Mardekatani Asl F, Abdollahi-Nejand B, Moravvej-Farshi M K. The effect of bromine on the mixed halide perovskite . ICOP & ICPET _ INPC _ ICOFS 2018; 24 :809-812
URL: http://opsi.ir/article-1-1568-en.html
URL: http://opsi.ir/article-1-1568-en.html
Zahra Yeganegi * 
1, Farzad Mardekatani Asl1 , Bahram Abdollahi-Nejand1 , Mohammad Kazem Moravvej-Farshi1
1, Farzad Mardekatani Asl1 , Bahram Abdollahi-Nejand1 , Mohammad Kazem Moravvej-Farshi1
1- Faculty of Electrical and Computer Engineering, Tarbiat Modares University
Abstract: (2144 Views)
Using the sequential deposition method, we introduce a mix halide perovskite solar cell. The Pb and I are provided by PbI2 precursor and Br is delivered by Methyl ammonium bromide (MABr) precursor. The effect of Br on the open circuit voltage (VOC) and the band gap is studied. Addition of Br to the iodide-based perovskite improves its surface morphology and widens the perovskite bandgap, and hence increases the resulting solar cell VOC. However, pinholes created in the perovskite layer due to addition Br results in a dramatically reduced short circuit current density (JSC). The UV-Vis spectroscopy, indicating two optical bandgaps, confirms a two-phase perovskite structure is produced.
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