Advanced Energy Materials

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  1. Nitrogen-Doped Porous Molybdenum Carbide and Phosphide Hybrids on a Carbon Matrix as Highly Effective Electrocatalysts for the Hydrogen Evolution Reaction

    Yichao Huang, Jingxuan Ge, Jun Hu, Jiangwei Zhang, Jian Hao and Yongge Wei

    Version of Record online: 17 OCT 2017 | DOI: 10.1002/aenm.201701601

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    A novel organoimido-derivatized heteropolyoxometalate, Mo4-CNP, is designed as a precursor for hydrogen evolution reaction (HER) electrocatalysts. It is demonstrated that the carbon, nitrogen, and phosphorous sources derived from the Mo4-CNP molecules lead to in situ and confined carburization, phosphorization, and chemical doping on the atomic scale, forming nitrogen-doped porous molybdenum carbide and phosphide hybrids with remarkable electrocatalytic HER activity.

  2. Efficient Solar Cells Based on Light-Harvesting Antimony Sulfoiodide

    Riming Nie, Hyun-sung Yun, Min-Jae Paik, Aarti Mehta, Byung-wook Park, Yong Chan Choi and Sang Il Seok

    Version of Record online: 16 OCT 2017 | DOI: 10.1002/aenm.201701901

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    Solar cells with the configuration of FTO (fluorine-doped SnO2)/TiO2 blocking layer/mesoporous TiO2/SbSI/hole-transporting material/Au are demonstrated for the first time. The cells fabricated using TiO2 as an electron-transporting layer and poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] as a hole-transporting layer exhibit a power conversion efficiency of 3.05% under full illumination of air mass 1.5G.

  3. Atomic-Scale Monitoring of Electrode Materials in Lithium-Ion Batteries using In Situ Transmission Electron Microscopy

    Tongtong Shang, Yuren Wen, Dongdong Xiao, Lin Gu, Yong-Sheng Hu and Hong Li

    Version of Record online: 16 OCT 2017 | DOI: 10.1002/aenm.201700709

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    Based on the relationships among structure evolution, reaction kinetics and performance, understanding the electrochemical reaction mechanism of electrode materials provides guidelines for improving performance and designing electrode materials of LIBs. This article summarizes recent progresses towards unraveling the atomic-scale structure evolution of different electrode materials using in situ TEM with three electrochemical reaction mechanisms: intercalation, conversion and alloying reactions

  4. p-Type CuI Islands on TiO2 Electron Transport Layer for a Highly Efficient Planar-Perovskite Solar Cell with Negligible Hysteresis

    Mahdi Malekshahi Byranvand, Taewan Kim, Seulki Song, Gyeongho Kang, Seung Un Ryu and Taiho Park

    Version of Record online: 16 OCT 2017 | DOI: 10.1002/aenm.201702235

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    It is revealed that the CuI islands on the TiO2 electron transport layer can induce change of polarity increasing electron extraction, establish barrier-free band alignment with perovskite, and reduce the trap sites. These changes of interface properties induce power conversion efficiency of 19.0% perovskite solar cell with negligible hysteresis.

  5. High-Efficiency Low-Temperature ZnO Based Perovskite Solar Cells Based on Highly Polar, Nonwetting Self-Assembled Molecular Layers

    Randi Azmi, Wisnu Tantyo Hadmojo, Septy Sinaga, Chang-Lyoul Lee, Sung Cheol Yoon, In Hwan Jung and Sung-Yeon Jang

    Version of Record online: 16 OCT 2017 | DOI: 10.1002/aenm.201701683

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    Low-temperature planar perovskite solar cells with efficiency of 18.82% are developed via a strategy that combines dual-functional self-assembled monolayer (SAM) modification of ZnO electron accepting layers with sequential deposition of perovskite active layers. The SAMs, constructed from newly synthesized molecules with high dipole moments, act both as excellent surface wetting control layers and as electric dipole layers for ZnO layers.