TY - Front. Optoelectron. A1 - Tao YUAN, Zhonghuan CAO, Guoli TU T1 - Indium tin oxide-free inverted polymer solar cells with ultrathin metal transparent electrodes Y1 - 2017-12-21 JF - Frontiers of Optoelectronics JO - Front. Optoelectron. SP - 402 EP - 408 VL - 10 IS - 4 UR - https://journal.hep.com.cn/foe N1 - 10.1007/s12200-017-0713-9 ER -