Conjugated Polymer Donors for Organic Solar Cells / Xiaopeng Xu, Xiyue Yuan, Qunping Fan, Chunhui Duan, Maojie Zhang, Qiang Peng -- p-Type Molecular Photovoltaic Materials / Qihui Yue, Xiaozhang Zhu -- Fullerene Acceptors / Zuo Xiao -- Non-fullerene Small-Molecule Acceptors for Organic Solar Cells / Wei Gao, Jun Yuan, Zhenghui Luo, Jinru Cao, Weihua Tang, Yingping Zou, Chuluo Yang -- Electron-Donating Ladder-Type Heteroacenes for Photovoltaic Applications: From Polymer Donor Materials to Small-Molecule Acceptor Materials / Qisheng Tu, Yunlong Ma, Qingdong Zheng -- Chlorinated Organic Solar Cells / Hui Chen, Mingrui Pu, Feng He -- Polymer-Polymer Solar Cells: Materials, Device, and Stability / Jianyu Yuan, Huiliang Sun, Yingjian Yu, Wanli Ma, Xugang Guo, Jun Liu -- Organic Solar Cells with High Open-Circuit Voltage >1 V / Ailing Tang, Yuze Lin, Erjun Zhou -- Single-Component Organic Solar Cells / Guitao Feng, Yiting Guo, Weiwei Li -- Tandem Organic Solar Cells: Recent Progress and Challenge / Lingxian Meng, Xiangjian Wan, Yongsheng Chen -- Large-Area Flexible Organic Solar Cells / Shaorong Huang, Yufei Wang, Lintao Hou, Lie Chen -- Organic Photovoltaics for Indoor Applications / Zhan′ao Tan, Yinglong Bai, Shan Jiang -- Interfacial Design for Efficient Organic Solar Cells / Yao Liu, Menglan Lv, Shengjian Liu -- Morphological Characterization and Manipulation of Organic Solar Cells / Wei Li, Long Ye, Tao Wang -- Operational Stability and Built-in Potential in Organic Solar Cells / Weixia Lan, Bo Wu, Furong Zhu -- Voltage Losses and Charge Transfer States in Donor-Acceptor Organic Solar Cells / Hongbo Wu, Mengyang Li, Zaifei Ma, Zheng Tang -- Stability of Organic Solar Cells: From Fullerene Derivatives to Non-fullerene Acceptors / Xiaoyan Du, Jing Guo, Jie Min, Ning Li -- Potential Applications of Organic Solar Cells / Chengyi Xiao, Weiwei Li.