2.3 Charge‐Selective Contact Materials for Perovskite Solar Cells (PSCs)
Peng Gao and Mohammad Khaja Nazeeruddin
Ecole Polytechnique Federale Lausanne, SCI‐SB‐MN, Rue de l'Industrie 17, Case postale 440, Sion, 1951, Switzerland
High‐efficiency perovskite solar cells (PSCs) are typically fabricated with an organometal halide perovskite–infiltrated mesostructure as light absorber and charge transporter, sandwiched between a p‐type electron‐blocking hole‐selective layer hole transporting materials (HTM) and an n‐type hole‐blocking electron‐selective layer electron transporting materials (ETM) [1–3]. During the early development stage of PSCs, researchers were puzzled by the situation that similar efficiencies can be obtained in devices ...
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