Highly conductive and transparent carbon nanotube-based electrodes for ultrathin and stretchable organic solar cells

Fan Qingxia^{1, 3}, Zhang Qiang^{1, 3}, Zhou Wenbin¹, Yang Feng^{1, 3}, Zhang Nan¹, Xiao Shiqi^{1, 3}, Gu Xiaogang^{1, 3}, Xiao Zhuojian^{1, 3}, Chen Huiliang^{1, 3}, Wang Yanchun^{1, 2, 3}, Liu Huaping^{1, 2, 3}, Zhou Weiya^{1, 2, 3, †}

(color online) (a) Schematic diagram of OSC structure with Au-CNT film as anode. Photographs of flexible OSC mounted on a finger when the finger was (b) bent and (c) straight. (d) Photograph of OSC wrapped around a copper wire, whose diameter is 200 μm. (e) Photograph of ultrathin flexible OSC. J–V characteristics of OSC constructed on CNT, Au-CNT, and ITO electrode (f) without and (g) with the cathode buffer layer, under illumination of a simulated AM 1.5 G 100-mW/cm² light.