title: Solution-processed nickel acetate as hole collection layer for polymer solar cells.
abstract: We report efficient polymer solar cells (PSCs) based on poly(3-hexylthiophene) (P3HT) and indene-C(60) bisadduct (ICBA) with water soluble nickel acetate (NiAc) instead of acidic poly(ethylenedioxythiophene) : poly(styrene sulfonate) (PEDOT : PSS) as hole collection layer (HCL). The NiAc layer after thermal annealing at 150 °C for 30 min (α-NiAc) shows high transparency with light transmittance better than PEDOT : PSS in the wavelength range of 500-900 nm, high hole mobility of 1.3 × 10(-3) cm(2) V(-1) s(-1) and suitable energy levels for application as HCL. The power conversion efficiency of the PSC based on P3HT/ICBA with the α-NiAc anode buffer layer reached 6.08% under the illumination of AM1.5G 100 mW cm(-2), which is among the best efficiencies of the P3HT-based PSCs. This work gives a new option for HCL selection in designing higher efficiency and more stable PSCs.
authors: State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, China. tanzhanao@ncepu.edu.cn
authors: Zhan'ao
authors: Z
authors: Tan
authors: Wenqing
authors: W
authors: Zhang
authors: Deping
authors: D
authors: Qian
authors: Chaohua
authors: C
authors: Cui
authors: Qi
authors: Q
authors: Xu
authors: Liangjie
authors: L
authors: Li
authors: Shusheng
authors: S
authors: Li
authors: Yongfang
authors: Y
authors: Li