Gou Yanzhuo, Zhang Jiayi, Jin Bowen, Dai Weideren, Zhang Wei, Chen Chang, Lin Liangyou, Wang Xianbao, Tai Qidong, Li Jinhua
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory for the Green Preparation and Application of Functional Material, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, China.
The College of Post and Telecommunication of WIT, Wuhan, 430073, China.
Small. 2024 Sep;20(38):e2403342. doi: 10.1002/smll.202403342. Epub 2024 May 14.
Perovskite solar cell (PSC) is a promising photovoltaic technology that achieves over 26% power conversion efficiency (PCE). However, the high materials costs, complicated fabrication process, as well as poor long-term stability, are stumbling blocks for the commercialization of the PSCs in normal structures. The hole transport layer (HTL)-free carbon-based PSCs (C-PSCs) are expected to overcome these challenges. However, C-PSCs have suffered from relatively low PCE due to severe energy loss at the perovskite/carbon interface. Herein, the study proposes to boost the hole extraction capability of carbon electrode by incorporating functional manganese (II III) oxide (MnO). It is found that the work function (W) of the carbon electrode can be finely tuned with different amounts of MnO addition, thus the interfacial charge transfer efficiency can be maximized. Besides, the mechanical properties of carbon electrode can also be strengthened. Finally, a PCE of 19.03% is achieved. Moreover, the device retains 90% of its initial PCE after 2000 h of storage. This study offers a feasible strategy for fabricating efficient paintable HTL-free C-PSCs.
钙钛矿太阳能电池（PSC）是一种很有前景的光伏技术，其功率转换效率（PCE）超过26%。然而，高材料成本、复杂的制造工艺以及较差的长期稳定性，是常规结构PSC商业化的绊脚石。无空穴传输层（HTL）的碳基PSC（C-PSC）有望克服这些挑战。然而，由于钙钛矿/碳界面处的严重能量损失，C-PSC的PCE相对较低。在此，该研究提出通过掺入功能性锰（II III）氧化物（MnO）来提高碳电极的空穴提取能力。研究发现，通过添加不同量的MnO可以精细调节碳电极的功函数（W），从而使界面电荷转移效率最大化。此外，碳电极的机械性能也可以得到增强。最终，实现了19.03%的PCE。此外，该器件在储存2000小时后仍保留其初始PCE的90%。这项研究为制造高效的可喷涂无HTL C-PSC提供了一种可行的策略。
