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    Aqueous-Processed Polymer/Nanocrystals Hybrid Solar Cells: The Effects of Chlorine on the Synthesis of CdTe Nanocrystals, Crystal Growth, Defect Passivation, Photocarrier Dynamics, and Device Performance

    Qingsen Zeng, Zhaolai Chen, Fangyuan Liu, Gan Jin, Xiaohang Du, Tianjiao Ji, Yue Zhao, Yuanyuan Yue, Prof. Haiyu Wang, Dedong Meng, Prof. Tengfeng Xie, Prof. Hao Zhang and Prof. Bai Yang

    Version of Record online: 4 JAN 2017 | DOI: 10.1002/solr.201600020

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    The effects of chlorine on the synthesis of aqueous CdTe nanocrystals, crystal growth, defect passivation, photocarrier dynamics, and device performance are systematically investigated. The device performance of aqueous-processed polymer/CdTe hybrid solar cells is dramatically improved after incorporating CdTe NCs with Cl. This is attributed to the reduced nongeminate recombination leading to improved charge extraction efficiency.

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    Boosting Organic Photovoltaic Performance Over 11% Efficiency With Photoconductive Fullerene Interfacial Modifier

    Dr. Jiang Huang, Xiaohua Zhang, Ding Zheng, Kangrong Yan, Prof. Chang-Zhi Li and Prof. Junsheng Yu

    Version of Record online: 4 JAN 2017 | DOI: 10.1002/solr.201600008

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    An aza[60]fulleroid atop of metal oxide can boost organic photovoltaic performance over ∼11.3% efficiency and fill factor of 0.77. The fullerene modifier not only passivates ZnOx surface defects, but also improves energetic alignment and charge extraction of modified interlayer due to the excited charge transfer characteristics from azafulleroid to ZnOx.

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    Cu2ZnSnSe4 Photovoltaic Absorber Layers Evaluated by Transmission X-Ray Microscopy Tomography: Composition Fluctuations on the Length Scale of Grains

    Dennis S. Pruzan, Anna E. Caruso, Dr. Yijin Liu, Dr. Yu Lin, Dr. Carolyn Beall, Dr. Ingrid Repins, Dr. Michael F. Toney and Prof. Michael A. Scarpulla

    Version of Record online: 30 DEC 2016 | DOI: 10.1002/solr.201600024

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    Transmission X-ray Microscopy Tomography is used to investigate compositional fluctuations in Cu2ZnSnSe4 solar cells. The authors observe micron-scale anticorrelation between Cu and Zn, a length scale consistent with fluctuations from grain to grain. This result yields further insight into the causes of VOC deficits and challenges with homogeneous growth in these materials.

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    A Flexible Web-Based Approach to Modeling Tandem Photocatalytic Devices

    Prof. Brian Seger, Prof. Ole Hansen and Prof. Peter C. K. Vesborg

    Version of Record online: 20 DEC 2016 | DOI: 10.1002/solr.201600013

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    This work describes a web-based model for photoelectrochemical reactions. The program can do both theoretical modeling as well as take user-generated experimental data and model performance based on this. This work uses previous best in class photoelectrochemical half-cells to analyze optimal 2-photoabsorber water splitting efficiencies.

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    Imaging Surface Recombination Velocities of Grain Boundaries in Multicrystalline Silicon Wafers via Photoluminescence

    Hang Cheong Sio, Sieu Pheng Phang and Daniel Macdonald

    Version of Record online: 7 DEC 2016 | DOI: 10.1002/solr.201600014

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    A method for imaging the effective surface recombination velocity of grain boundaries in multicrystalline silicon wafers based on photoluminescence imaging is presented. The technique allows the overall recombination behaviors of grain boundaries in a multicrystalline wafer to be statistically quantified in absolute scale, which is important for studying grain boundaries and assessing their detrimental impact on the final solar cell performance.