Organic spacer cations in low-dimensional organic–inorganic hybrid perovskites (LDPVKs) significantly affect the performance of perovskite materials and devices. Herein, we systematically examine the effects of four distinct organic spacer cations on the properties of materials and perovskite thin film transistors (TFTs). Our study explores the consequences of varying chain lengths, including butylamine (BA) and octylamine (OA), and also considers the impact of incorporating benzene rings, such as phenethylamine (PEA), as well as the influence of fluorine-substituted benzene ring side chains, as represented by fluorine-substituted phenethylamine (FPEA), within these organic spacer cations. The results show that long-chain organic cations such as alkyl-chain cations improve the stability of TFTs but does not improve its field effect mobility. Because it provides π-π stacking, the benzene ring cation improves the carrier mobility performance of LDPVKs. This significantly improves the electrical performance and stability of LDPVK TFTs, affording a field-effect mobility of 7.47 cm²/(V·s) and the threshold voltage difference between the positive and negative sweep (ΔV_TH) of 0.25 V. Therefore, when designing provide a molecular design direction for selecting organic spacer cations in low-dimensional for organic–inorganic hybrid perovskites, various factors should be considered to optimized. This work study guides the designing LDPVKs and improving the performances of field-effect devices in the future.

低维有机-无机杂化钙钛矿（LDPVK）中的有机间隔阳离子显着影响钙钛矿材料和器件的性能。在此，我们系统地研究了四种不同的有机间隔阳离子对材料和钙钛矿薄膜晶体管（TFT）性能的影响。我们的研究探讨了不同链长（包括丁胺（BA）和辛胺（OA））的影响，并考虑了苯乙胺（PEA）等苯环的影响，以及氟取代苯环侧的影响这些有机间隔阳离子内有以氟取代苯乙胺 (FPEA) 为代表的链。结果表明，烷基链阳离子等长链有机阳离子提高了TFT的稳定性，但并没有提高其场效应迁移率。由于苯环阳离子提供π-π堆积，因此改善了LDPVK的载流子迁移率性能。这显着提高了 LDPVK TFT 的电性能和稳定性，场效应迁移率为 7.47 cm ² /(V·s)，正负扫描阈值电压差 (ΔV _TH ) 为 0.25 V。设计为有机-无机杂化钙钛矿低维有机间隔阳离子的选择提供了分子设计方向，应考虑各种因素进行优化。这项工作研究指导了未来LDPVK的设计和提高场效应器件的性能。