Triethylsilane introduced precursor engineering towards efficient and stable perovskite solar cells

Yuanmei Huang, Wencai Zhou, Huaying Zhong, Wei Chen, Guoping Yu, Wenjie Zhang, Shuanglin Wang, Yujie Sui, Xin Yang, Yu Zhuang, Jun Tang, Leifeng Cao, Peter Müller-Buschbaum, Abuduwayiti Aierken, Peigang Han, Zeguo Tang

Research output: Contribution to journalArticlepeer-review


Perovskite solar cells (PSCs) are believed to be optimistic for commercial deployment soon since the power conversion efficiency of PSCs presently reaches up to 26.10 % due to the intensive efforts these years. The two-step method is comparatively more suitable for scalable perovskite films, where lead halides and ammonium salts are prepared in separate precursors and deposited sequentially. Therefore, the reactivity between these two precursors governs the quality of final perovskite films and the intrinsic non-radiative recombination (NRR) at the perovskite's interfaces. Herein, we empowered both types of precursors, one by one and then simultaneously, with triethylsilane (TES) to investigate its effect on the (FAPbI3)1-x (MAPbBr3)x perovskite's morphological and optoelectronic properties. TES, with ethyl moieties and metalloid center, in ammonium salts delivers homogeneous perovskites' crystals and inhibits the NRR of perovskite films by reducing the defects and trap states. As a result, the optimized devices exhibit not only improved device performance (particularly for the increased fill factors and open circuit voltages) but also enhanced stabilities.

Original languageEnglish
Article number100449
JournalMaterials Today Advances
StatePublished - Mar 2024


  • Precursor engineering
  • Stability
  • Triethylsilane
  • Two-step method


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