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Paper detail

Why Lead Methylammonium tri-IODIDE perovskite-based solar cells requires a mesoporous electron transporting scaffold (but not necessarily a hole conductor)

CH3NH3PbI3-based solar cells were characterized with electron beam-induced current (EBIC), and compared to CH3NH3PbI3-xClx ones. A spatial map of charge separation efficiency in working cells shows p-i-n structures for both thin film cells. Effective diffusion lengths, LD, (from EBIC profile) show that holes are extracted significantly more efficiently than electrons in CH3NH3PbI3, explaining why CH3NH3PbI3-based cells require mesoporous electron conductors, while CH3NH3PbI3-xClx ones, where LD values are comparable for both charge types, do not.

preprint2014arXivOpen access
Eran EdriSaar KirmayerAlex HenningSabyasachi MukhopadhyayKonstantin GartsmanYossi RosenwaksGary HodesDavid Cahen
cond-mat.mtrl-sciphysics.chem-ph
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Eran EdriSaar KirmayerAlex HenningSabyasachi MukhopadhyayKonstantin GartsmanYossi RosenwaksGary HodesDavid Cahen

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