Carbon-based perovskite solar cell without hole transport layer achieves 14.15% efficiency

Researchers in China have outlined a new surface engineering strategy to build low-cost solar cells without a hole transport layer. The devices were treated with benzoylcholine halide to reduce non-radiation recombination and achieved remarkable efficiency and stability. A group of scientists led by the Beihang University in China has developed a carbon-based all-inorganic perovskite solar cell without the use of an expensive hole transport layer (HTL). In the proposed cell architecture, the absence of the HTL, which prevents direct contact between the carbon electrode and the perovskite, is compensated ...

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