Citation: Zhu Tao, Yang Yongrui, Zhou Suyuan, Yao Xiang, Liu Lei, Hu Wenping, Gong Xiong. Bulk heterojunction perovskite solar cells incorporated with solution-processed TiO_x nanoparticles as the electron acceptors[J]. Chinese Chemical Letters, ;2020, 31(9): 2249-2253. doi: 10.1016/j.cclet.2020.02.004 shu

Bulk heterojunction perovskite solar cells incorporated with solution-processed TiO_x nanoparticles as the electron acceptors

Zhu Tao ^a,1 ,
Yang Yongrui ^a,1 ,
Zhou Suyuan ^a ,
Yao Xiang ^b ,
Liu Lei ^a ,
Hu Wenping ^b,*, ,
Gong Xiong ^a,*,

a.
Department of Polymer Engineering, College of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH 44325, United States
b.
Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, School of Science, Tianjin University and Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin 300072, China

huwp@tju.edu.cn

xgong@uakron.edu

Received Date: 29 December 2019
Revised Date: 24 January 2020
Accepted Date: 5 February 2020
Available Online: 5 February 2020

Figures(5)

In the past ten years, perovskite solar cells were rapidly developed, but the intrinsic unbalanced charge carrier diffusion lengths within perovskite materials were not fully addressed by either a planar heterojunction or meso-superstructured perovskite solar cells. In this study, we report bulk heterojunction perovskite solar cells, where perovskite materials CH₃NH₃PbI₃ is blended with solution-processed n-type TiO_x nanoparticles as the photoactive layer. Studies indicate that one-step solution-processed CH₃NH₃PbI₃:TiO_x bulk-heterojunction thin film possesses enhanced and balanced charge carrier mobilities, superior film morphology with enlarged crystal sizes, and suppressed trapinduced charge recombination. Thus, bulk heterojunction perovskite solar cells by CH₃NH₃PbI₃ mixed with 5 wt% of TiO_x, which is processed by one-step method rather than typical two-step method, show a short-circuit current density of 20.93 mA/cm², an open-circuit voltage of 0.90 V, a fill factor of 80% and with a corresponding power conversion efficiency of 14.91%, which is more than 30% enhancement as compared with that of perovskite solar cells with a planar heterojunction device structure. Moreover, bulk heterojunction perovskite solar cells possess enhanced device stability. All these results demonstrate that perovskite solar cells with a bulk heterojunction device structure are one of apparent approaches to boost device performance.
- Bulk heterojunction,
- Perovskite,
- TiO_x,
- Balanced mobilities,
- Stability
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沈阳化工大学材料科学与工程学院沈阳 110142

Bulk heterojunction perovskite solar cells incorporated with solution-processed TiOx nanoparticles as the electron acceptors

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通讯作者: 陈斌, bchen63@163.com

Bulk heterojunction perovskite solar cells incorporated with solution-processed TiO_x nanoparticles as the electron acceptors