2D materials for conducting holes from grain boundaries in perovskite solar cells

被引：0

作者：

Peng You

Guanqi Tang

Jiupeng Cao

Dong Shen

Tsz-Wai Ng

Zafer Hawash

Naixiang Wang

Chun-Ki Liu

Wei Lu

Qidong Tai

Yabing Qi

Chun-Sing Lee

Feng Yan

机构：

[1] The Hong Kong Polytechnic University,Department of Applied Physics

[2] Hung Hom,College of New Materials and New Energies

[3] Shenzhen Technology University,Center of Super

[4] City University of Hong Kong,Diamond and Advanced Films (COSDAF), Department of Chemistry

[5] Energy Materials and Surface Sciences Unit (EMSSU),University Research Facility in Materials Characterization and Device Fabrication

[6] Okinawa Institute of Science and Technology Graduate University (OIST),undefined

[7] 1919-1 Tancha,undefined

[8] Onna-son,undefined

[9] The Hong Kong Polytechnic University,undefined

[10] Hung Hom,undefined

来源：

Light: Science & Applications | / 10卷

关键词：

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Grain boundaries in organic–inorganic halide perovskite solar cells (PSCs) have been found to be detrimental to the photovoltaic performance of devices. Here, we develop a unique approach to overcome this problem by modifying the edges of perovskite grain boundaries with flakes of high-mobility two-dimensional (2D) materials via a convenient solution process. A synergistic effect between the 2D flakes and perovskite grain boundaries is observed for the first time, which can significantly enhance the performance of PSCs. We find that the 2D flakes can conduct holes from the grain boundaries to the hole transport layers in PSCs, thereby making hole channels in the grain boundaries of the devices. Hence, 2D flakes with high carrier mobilities and short distances to grain boundaries can induce a more pronounced performance enhancement of the devices. This work presents a cost-effective strategy for improving the performance of PSCs by using high-mobility 2D materials.

引用