Abstract Performance of hole transporting material (HTM) plays a fundamental role in estimating overall efficiency of perovskite solar cell (PSC). Dopant free HTMs with high intrinsic hole mobility and stability have been emerged as a fascinating choice for production of highly efficient and stable PSCs. Here, we report facile synthesis and implementation of a novel tetrathiafulvalene (TTF) derivative as a dopant free HTM for efficient and ambient stable PSC. The PSC based on dopant free TTF HTM shows remarkable photovoltaic efficiency of 15.66% which is one of highest value for any TTF based HTM. Beside efficiency, PSC based on TTF HTM shows only about 16% decline in initial efficiency even after 45 days storage in ambient conditions without any encapsulation which verifies its excellent ambient stability and hydrophobicity. Furthermore, various physical, electrochemical, photovoltaic and optical parameters of TTF HTM are investigated by highly specialized characterization tools. We affirm these results will be helpful for developing novel HTMs for highly efficient and stable PSCs in future.

中文翻译：

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基于四硫富瓦烯衍生物的新型空穴传输材料：迈向无掺杂、环境稳定和高效钙钛矿太阳能电池的一步

摘要 空穴传输材料 (HTM) 的性能在估计钙钛矿太阳能电池 (PSC) 的整体效率方面起着重要作用。具有高固有空穴迁移率和稳定性的无掺杂 HTM 已成为生产高效和稳定 PSC 的绝佳选择。在这里，我们报告了一种新型四硫富瓦烯 (TTF) 衍生物作为一种无掺杂剂的 HTM 的简便合成和实现，用于高效和环境稳定的 PSC。基于无掺杂剂 TTF HTM 的 PSC 显示出 15.66% 的显着光伏效率，这是任何基于 TTF 的 HTM 的最高值之​​一。除了效率之外，基于 TTF HTM 的 PSC 即使在没有任何封装的环境条件下储存 45 天后，初始效率也仅下降约 16%，这证实了其出色的环境稳定性和疏水性。此外，通过高度专业化的表征工具研究了 TTF HTM 的各种物理、电化学、光伏和光学参数。我们肯定这些结果将有助于在未来开发用于高效稳定 PSC 的新型 HTM。