Advanced Functional Materials 热点文章排行榜Top 3 (2015年5月)

Unraveling the Reasons for Efficiency Loss in Perovskite Solar Cells

Yong Hui Lee, Jingshan Luo, Robin Humphry-Baker, Peng Gao, Michael Grätzel and Mohammad Khaja Nazeeruddin

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The influence of the unreacted PbI2 to the performance of perovskite solar cells is investigated. The optimized morphology of the PbI2under layer is found to be essential to form a dense perovskite layer preventing recombination by direct contact between TiO2 and a hole transporting layer, and increase the charge collection efficiency.

 

 

 

 

 

Morphological Control for High Performance, Solution-Processed Planar Heterojunction Perovskite Solar Cells

Deepu J. Giles E. Eperon, Victor M. Burlakov, Pablo Docampo, Alain Goriely and Henry J. Snaith

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The critical role of perovskite morphology in planar heterojunction perovskite solar cells is probed and understood. Dewetting of perovskite films is minimized, to achieve uniform 100% coverage perovskite layers. Solution cast planar heterojunction solar cells with efficiencies of up to 11.4% are fabricated, a new record for such cells with no mesoporous layer.

 

 

 

 

Sea-Urchin-Inspired 3D Crumpled Graphene Balls Using Simultaneous Etching and Reduction Process for High-Density Capacitive Energy Storage

Jang Yeol Lee, Kwang-Hoon Lee, Young Jin Kim, Jeong Sook Ha, Sang-Soo Lee and Jeong Gon Son

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Highly crumpled graphene balls with a sea-urchin-shaped template strategy are facilely fabricated in bulk quantities with high yield through simultaneous etching–reduction of graphene oxide-encapsulated iron oxide. The crumpled balls, which exhibit significantly larger surface area and higher water-dispersion stability than those of stacked graphene and other crumpling approaches, and their 3D macroporous networks present superior gravimetric and volumetric capacitance of electrochemical energy-storage electrodes.