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Dopant-free Starlike Molecular Hole Conductor with Ordered Packing for Durable all-Inorganic Perovskite Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-01-24 , DOI: 10.1002/aenm.202303997 Chenghao Duan 1, 2 , Feilin Zou 1 , Shiang Li 2 , Qiliang Zhu 1 , Jiong Li 1 , Honggang Chen 1 , Zheng Zhang 1 , Chang Chen 1 , Huan Guo 1 , Jianhang Qiu 3 , Ke Wang 1 , Yuyan Dong 1 , Yongcai Qiu 1 , Liming Ding 4 , Xinhui Lu 2 , Hongze Luo 5 , Keyou Yan 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-01-24 , DOI: 10.1002/aenm.202303997 Chenghao Duan 1, 2 , Feilin Zou 1 , Shiang Li 2 , Qiliang Zhu 1 , Jiong Li 1 , Honggang Chen 1 , Zheng Zhang 1 , Chang Chen 1 , Huan Guo 1 , Jianhang Qiu 3 , Ke Wang 1 , Yuyan Dong 1 , Yongcai Qiu 1 , Liming Ding 4 , Xinhui Lu 2 , Hongze Luo 5 , Keyou Yan 1
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All-inorganic n-i-p perovskite solar cells (PSCs) using doped Spiro-OMeTAD as hole transport material (HTM) suffer from photothermal stability due to ionic diffusion and radical-induced degradation by the dopants. In this article, dopant-free starlike molecule (N2, N2-bis(4-(bis(4-methoxyphenyl)amino)phenyl)-N5,N5-bis(4-methoxyphenyl)pyridine-2,5-diamine (BD)) is synthesized to engineer the stacking properties and delivered higher hole mobility than doped Spiro-OMeTAD (3.2 × 10−4 versus 1.76 × 10−4 cm2 V−1 s−1) as dopant-free HTM. Starlike BD HTM has a twisted acceptor unit and strong dipole, forming crystalline and ordered packing film to ensure intramolecular charge transfer and improve mobility. The BD CsPbI3 PSCs deliver the maximum efficiency of 19.19%, which is the highest performance for all-inorganic PSCs based on dopant-free HTMs. Meanwhile, the ordered molecules-packing blocks the migration channel of I− ions to metal electrodes and improves the device stability. BD-based devices maintain more than 93% and 80% of the initial efficiency after 85 °C storage for 35 days and maximum power point (MPP) tracking at 85 °C for 1000 h, respectively.
中文翻译：
用于耐用全无机钙钛矿太阳能电池的有序堆积无掺杂星状分子孔导体
使用掺杂Spiro-OMeTAD作为空穴传输材料（HTM）的全无机nip钙钛矿太阳能电池（PSC）由于离子扩散和掺杂剂引起的自由基诱导降解而存在光热稳定性问题。在本文中，不含掺杂剂的星形分子（N2，N2-双（4-（双（4-甲氧基苯基）氨基）苯基）-N5，N5-双（4-甲氧基苯基）吡啶-2,5-二胺（BD） ）被合成以设计堆叠特性，并提供比作为无掺杂剂HTM的掺杂Spiro-OMeTAD（3.2 × 10 -4 与1.76 × 10 -4 cm 2 V -1 s -1 ）更高的空穴迁移率。 Starlike BD HTM 具有扭曲的受体单元和强偶极子，形成结晶有序的堆积膜，确保分子内电荷转移并提高迁移率。 BD CsPbI 3 PSC 的最高效率为 19.19%，这是基于无掺杂 HTM 的全无机 PSC 的最高性能。同时，有序的分子堆积阻断了I -离子向金属电极的迁移通道，提高了器件的稳定性。基于BD的器件在85°C存储35天和最大功率点（MPP）跟踪85°C 1000小时后分别保持超过93%和80%的初始效率。
更新日期：2024-01-24
中文翻译：
用于耐用全无机钙钛矿太阳能电池的有序堆积无掺杂星状分子孔导体
使用掺杂Spiro-OMeTAD作为空穴传输材料（HTM）的全无机nip钙钛矿太阳能电池（PSC）由于离子扩散和掺杂剂引起的自由基诱导降解而存在光热稳定性问题。在本文中，不含掺杂剂的星形分子（N2，N2-双（4-（双（4-甲氧基苯基）氨基）苯基）-N5，N5-双（4-甲氧基苯基）吡啶-2,5-二胺（BD） ）被合成以设计堆叠特性，并提供比作为无掺杂剂HTM的掺杂Spiro-OMeTAD（3.2 × 10 -4 与1.76 × 10 -4 cm 2 V -1 s -1 ）更高的空穴迁移率。 Starlike BD HTM 具有扭曲的受体单元和强偶极子，形成结晶有序的堆积膜，确保分子内电荷转移并提高迁移率。 BD CsPbI 3 PSC 的最高效率为 19.19%，这是基于无掺杂 HTM 的全无机 PSC 的最高性能。同时，有序的分子堆积阻断了I -离子向金属电极的迁移通道，提高了器件的稳定性。基于BD的器件在85°C存储35天和最大功率点（MPP）跟踪85°C 1000小时后分别保持超过93%和80%的初始效率。
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