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首页> 外文期刊>Advanced energy materials >Molecular Engineering of Copper Phthalocyanines: A Strategy in Developing Dopant-Free Hole- Transporting Materials for Efficient and Ambient-Stable Perovskite Solar Cells
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Molecular Engineering of Copper Phthalocyanines: A Strategy in Developing Dopant-Free Hole- Transporting Materials for Efficient and Ambient-Stable Perovskite Solar Cells

机译：酞菁铜的分子工程：开发高效和环境稳定的钙钛矿太阳能电池无掺杂空穴传输材料的策略

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摘要

Copper (II) phthalocyanines (CuPcs) have attracted growing interest as promising hole-transporting materials (HTMs) in perovskite solar cells (PSCs) due to their low-cost and excellent stability. However, the most efficient PSCs using CuPc-based HTMs reported thus far still rely on hygroscopic p-type dopants, which notoriously deteriorate device stability. Herein, two new CuPc derivatives are designed, namely CuPc-Bu and CuPc-OBu, by molecular engineering of the non-peripheral substituents of the Pc rings, and applied as dopant-free HTMs in PSCs. Remarkably, a small structural change from butyl groups to butoxy groups in the substituents of the Pc rings significantly influences the molecular ordering and effectively improves the hole mobility and solar cell performance. As a consequence, PSCs based on dopant-free CuPc-OBu as HTMs deliver an impressive power conversion efficiency (PCE) of up to 17.6% under one sun illumination, which is considerably higher than that of devices with CuPc-Bu (14.3%). Moreover, PSCs containing dopant-free CuPc-OBu HTMs show a markedly improved ambient stability when stored without encapsulation under ambient conditions with a relative humidity of 85% compared to devices containing doped Spiro-OMeTAD. This work thus provides a fundamental strategy for the future design of cost-effective and stable HTMs for PSCs and other optoelectronic devices.
机译：铜（II）酞菁（CuPcs）作为钙钛矿型太阳能电池（PSC）中的有前景的空穴传输材料（HTM），由于其低成本和出色的稳定性而引起了越来越多的兴趣。但是，迄今为止，使用基于CuPc的HTM的最有效的PSC仍然依赖于吸湿性p型掺杂剂，这无疑会降低器件的稳定性。在本文中，通过对Pc环的非外围取代基进行分子工程设计了两种新的CuPc衍生物，即CuPc-Bu和CuPc-OBu，并将其用作PSC中的无掺杂HTM。值得注意的是，Pc环取代基中从丁基到丁氧基的微小结构变化会显着影响分子排列，并有效改善空穴迁移率和太阳能电池性能。因此，基于无掺杂CuPc-OBu的PSC作为HTM在一个阳光照射下可提供高达17.6％的出色功率转换效率（PCE），这大大高于具有CuPc-Bu的器件的转换效率（14.3％） 。此外，与不含掺杂Spiro-OMeTAD的器件相比，包含无掺杂CuPc-OBu HTM的PSC在不封装的情况下在相对湿度为85％的环境条件下存储时，其环境稳定性显着提高。因此，这项工作为将来为PSC和其他光电设备设计具有成本效益且稳定的HTM提供了基本策略。

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  • 来源
    《Advanced energy materials》 |2019年第4期|1803287.1-1803287.9|共9页
  • 作者

    Jiang Xiaoqing; Wang Dongping; Yu Ze; Ma Wanying; Li Hai-Bei; Yang Xichuan; Liu Feng; Hagfeldt Anders; Sun Licheng;

  • 作者单位

    Dalian Univ Technol, Inst Energy Sci & Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem,Inst Artificial Photosynt, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Inst Energy Sci & Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem,Inst Artificial Photosynt, Dalian 116024, Peoples R China|Shenyang Univ Chem Technol, Coll Chem Engn, Shenyang 110142, Liaoning, Peoples R China;

    Dalian Univ Technol, Inst Energy Sci & Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem,Inst Artificial Photosynt, Dalian 116024, Peoples R China;

    Shenyang Univ Chem Technol, Coll Chem Engn, Shenyang 110142, Liaoning, Peoples R China;

    Shandong Univ, Sch Ocean, Weihai 264209, Peoples R China;

    Dalian Univ Technol, Inst Energy Sci & Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem,Inst Artificial Photosynt, Dalian 116024, Peoples R China;

    Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China;

    Ecole Polytech Fed Lausanne, Lab Photomol Sci, CH-1015 Lausanne, Switzerland;

    Dalian Univ Technol, Inst Energy Sci & Technol, DUT KTH Joint Educ & Res Ctr Mol Devices, State Key Lab Fine Chem,Inst Artificial Photosynt, Dalian 116024, Peoples R China|KTH Royal Inst Technol, Sch Engn Sci Chem Biotechnol & Hlth, S-10044 Stockholm, Sweden;

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  • 关键词

    copper (II) phthalocyanine; dopant-free; hole-transporting materials; perovskite solar cells; stability;

    机译：酞菁铜;无掺杂剂;空穴传输材料;钙钛矿太阳能电池;稳定性;

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