武汉理工大学王涛课题组
The Tao Wang Research Group
Perovskite Solar Cells

Perovskite solar cells evidence a rapid progress since 2009. The photoactive layer is made of organic-inorganic hybrid materials, e.g. CH3NH3PbI3-xClx, with a perovskite structure (an ABX3 crystal structure of calcium titanium oxide). The structure of the device evolves from meso-superstructure to planar heterojunction. Our approach to enhance the efficiency of these devices includes the variation of halogen fraction of the methylammonium lead trihalide, tuning the solution for spin or spray casting to minimise structure defects, post-treating (thermal and solvent annealing) to improve crystalline structure.


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In-Plane Device Structure                         Out-of-Plane Device Structure                                            J-V scans


Scalable Thin Film Deposition Methods Employed in Our Work

Bar Coating                                                                                                        Spray Coating


Ref:

1. Liyan Yang, Alexander T. Barrows, David G. Lidzey*. Tao Wang*. Recent progress and challenges of organometal halide perovskite solar cells. Rep. Prog. Phys. 2016, 79, 026501. (Invited review)

2. Liyan Yang, Feilong Cai, Yu Yan et al., Conjugated small molecule for efficient hole transport in high-performance p-i-n type perovskite solar cells.Adv. Funct. Mater., 2017, 27, 1702613.

3. Feilong Cai, Jinlong Cai, Liyan Yang, et al., Molecular engineering of conjugated polymers for efficient hole transport and defect passivation in perovskite solar cells. Nano Energy, 2018, 45, 28.

4. Liyan Yang, Mingliang Wu, Feilong Cai, et al., Restrained light-soaking and reduced hysteresis in perovskite solar cells employing a helical perylene diimide interfacial layer. Journal of Materials Chemistry A, 2018, http://dx.doi.org/10.1039/C8TA02584C.

5. Jiaxu Yao, Liyan Yang, Feilong Cai, et al., The impacts of PbI2 purity on morphology and device performance of one-step spray ocated planar heterojunction perovskite solar cells. Sustainable Energy & Fuels, 2018, 2, 436.

6. Feilong Cai, Liyan Yang, Yu Yan et al., Eliminated hysteresis and stabilized power output over 20% in planar heterojunction perovskite solar cells by compositional and surface modifications to hte low-temperature-processed TiO2  layer. J. Mater. Chem. A, 2017, 5, 9402-9411.

7. Xuan Liu, Xinxin Xia, Qiuquan Cai, et al., Efficient planar heterojunction perovskite solar cells with weak hysteresis fabricated via bar coating. Solar Energy Materials & Solar Cells. 2017, 159, 412-417.

8. Liyan Yang, Yu Yan, Feilong Cai, Jinghai Li, Tao Wang*. Poly(9-vinyl carbazole) as a hole transport material for efficient and stable invertd planar heterojunction perovskite solar cells. Solar Energy Materials & Solar Cells. 2017, 163, 210-217.


9. Youyu Jiang, Bangwu Luo, Fangyuan Jiang, Fuben Jiang, Canek Fuentes-Hernandez, Tiefeng Liu, Lin Mao, Sixing, Xiong, Zaifang Li, Tao Wang, Bernard Kippelen, Yinhua Zhou*,Efficient colorful perovskite solar cells using a top polymer electrode simultaneously as spectrally selective antireflection coating. ‍Nano Letters, 2016,‍ 16, 7829-7835.