Journal
ACS APPLIED ENERGY MATERIALS
Volume 6, Issue 21, Pages 11005-11011Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.3c01857
Keywords
hole conductor; electron conductor; perovskite; hole mobility; charge extraction
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This study found that monocation perovskites perform better than mixed-cation perovskites in HTL-free cells due to their superior hole mobility and p-type behavior. Mixed-cation perovskites work better in other types of cells.
In perovskite solar cells, mixed-cation perovskites offer high power conversion efficiencies due to the diverse A+ cations. In these cells, the perovskite is sandwiched between electron-transport and hole-transport layers (HTL). This study presents mono- and mixed-cation perovskites in HTL-free cells: monocation (MAPbI(3), FAPbI(3)) and mixed cation (MA(0.8)FA(0.2)PbI(3), FA(0.8)MA(0.2)PbI(3)). Surprisingly, monocation perovskites performed better than mixed-cation perovskites in HTL-free cells due to superior hole mobility and p-type behavior, while mixed-cation perovskites work better in n-i-p and p-i-n cells. These findings highlight the electronic differences for various types of perovskite, impacting the commercialization of perovskite solar cells.
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