中国物理B ›› 2021, Vol. 30 ›› Issue (10): 108801-108801.doi: 10.1088/1674-1056/ac1573

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Non-peripherally octaalkyl-substituted nickel phthalocyanines used as non-dopant hole transport materials in perovskite solar cells

Fei Qi(齐飞)1,2, Bo Wu(吴波)1,2, Junyuan Xu(徐俊源)1,2, Qian Chen(陈潜)1,2, Haiquan Shan(单海权)1,2, Jiaju Xu(许家驹)1,2,†, and Zong-Xiang Xu(许宗祥)1,2,‡   

  1. 1 Department of Chemistry, Southern University of Science and Technology, Shenzhen 518000, China;
    2 Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen 518000, China
  • 收稿日期:2021-06-01 修回日期:2021-06-28 接受日期:2021-07-18 出版日期:2021-09-17 发布日期:2021-09-26
  • 通讯作者: Jiaju Xu, Zong-Xiang Xu E-mail:xujj@sustech.edu.cn;xuzx@sustech.edu.cn
  • 基金资助:
    Project supported by the Shenzhen Overseas High-level Talents Innovation Plan of Technical Innovation (Grant No. KQJSCX20180323140712012) and the Major Program of Guangdong Basic and Applied Research (Grant No. 2019B121205001).

Non-peripherally octaalkyl-substituted nickel phthalocyanines used as non-dopant hole transport materials in perovskite solar cells

Fei Qi(齐飞)1,2, Bo Wu(吴波)1,2, Junyuan Xu(徐俊源)1,2, Qian Chen(陈潜)1,2, Haiquan Shan(单海权)1,2, Jiaju Xu(许家驹)1,2,†, and Zong-Xiang Xu(许宗祥)1,2,‡   

  1. 1 Department of Chemistry, Southern University of Science and Technology, Shenzhen 518000, China;
    2 Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen 518000, China
  • Received:2021-06-01 Revised:2021-06-28 Accepted:2021-07-18 Online:2021-09-17 Published:2021-09-26
  • Contact: Jiaju Xu, Zong-Xiang Xu E-mail:xujj@sustech.edu.cn;xuzx@sustech.edu.cn
  • Supported by:
    Project supported by the Shenzhen Overseas High-level Talents Innovation Plan of Technical Innovation (Grant No. KQJSCX20180323140712012) and the Major Program of Guangdong Basic and Applied Research (Grant No. 2019B121205001).

摘要: This report presents two non-perihperally octaalkyl-substituted nickel phthalocyanines (NiPcs), namely, NiEt2Pc and NiPr2Pc, for use as dopant-free hole transport materials in perovskite solar cells (PSCs). The length extension of the alkyl chains from ethyl to propyl significantly tunes the NiPcs' energy levels, thus reducing charge carrier recombination at the perovskite/hole transport layer (HTL) interface and leading to higher open-circuit voltage (VOC) and short-circuit current density (JSC) observed for the NiPr2Pc-based PSC. And higher charge carrier mobility, higher thin film crystallinity, and lower surface roughness of the NiPr2Pc HTL compared with that of the NiEt2Pc one also lead to higher JSC and fill factor (FF) observed for the NiPr2Pc-based device. Consequently, the NiPr2Pc-based PSC exhibits a higher power conversion efficiency (PCE) of 14.07% than that of the NiEt2Pc-based device (8.63%).

关键词: perovskite solar cells, metal phthalocyanines, hole transport layers

Abstract: This report presents two non-perihperally octaalkyl-substituted nickel phthalocyanines (NiPcs), namely, NiEt2Pc and NiPr2Pc, for use as dopant-free hole transport materials in perovskite solar cells (PSCs). The length extension of the alkyl chains from ethyl to propyl significantly tunes the NiPcs' energy levels, thus reducing charge carrier recombination at the perovskite/hole transport layer (HTL) interface and leading to higher open-circuit voltage (VOC) and short-circuit current density (JSC) observed for the NiPr2Pc-based PSC. And higher charge carrier mobility, higher thin film crystallinity, and lower surface roughness of the NiPr2Pc HTL compared with that of the NiEt2Pc one also lead to higher JSC and fill factor (FF) observed for the NiPr2Pc-based device. Consequently, the NiPr2Pc-based PSC exhibits a higher power conversion efficiency (PCE) of 14.07% than that of the NiEt2Pc-based device (8.63%).

Key words: perovskite solar cells, metal phthalocyanines, hole transport layers

中图分类号:  (Efficiency and performance of solar cells)

  • 88.40.hj
73.40.-c (Electronic transport in interface structures) 81.20.-n (Methods of materials synthesis and materials processing)