Cross-stacked superaligned carbon nanotube electrodes for efficient hole conductor-free perovskite solar cells

Qiang Luo; He Ma; Ye Zhang; Xuewen Yin; ZhiBo Yao; Ning Wang; Jianbao Li; Shoushan Fan; Kaili Jiang; Hong Lin

doi:10.1039/C6TA01715K

Cross-stacked superaligned carbon nanotube electrodes for efficient hole conductor-free perovskite solar cells†

Qiang Luo,‡^a He Ma,‡^b Ye Zhang,^a Xuewen Yin,^a ZhiBo Yao,^a Ning Wang,^c Jianbao Li,^ad Shoushan Fan,^b Kaili Jiang*^b and Hong Lin*^a

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* Corresponding authors

^a State Key Laboratory of New Ceramics & Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China
E-mail: hong-lin@mail.tsinghua.edu.cn

^b State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua-Foxconn Nanotechnology Research Center, Department of Physics, Collaborative Innovation Center of Quantum Matter, Tsinghua University, Beijing 100084, China
E-mail: JiangKL@mail.tsinghua.edu.cn

^c College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228, China

^d State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

Abstract

Cross-stacked superaligned carbon nanotube (CSCNT) sheets drawn from CNT arrays with excellent conductivity, porosity and flexibility are used as low-cost back contacts for hole conductor-free mesoscopic CH₃NH₃PbI₃/TiO₂ heterojunction perovskite solar cells (PSCs). PSCs integrated with CSCNTs achieve a power conversion efficiency of up to 8.65% and over 10.54% by further doping the CSCNTs with iodine. Moreover, PSCs encapsulated with a layer of polymer poly(methylmethacrylate) exhibit outstanding stability in the dark and under illumination. This work represents a significant step toward the commercialization of the low-cost, stable and high-efficiency hole conductor-free PSCs.

Journal of Materials Chemistry A

Cross-stacked superaligned carbon nanotube electrodes for efficient hole conductor-free perovskite solar cells†

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Cross-stacked superaligned carbon nanotube electrodes for efficient hole conductor-free perovskite solar cells

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