In widely studied organic–inorganic hybrid perovskites, the organic component tends to volatilize and decompose under high temperatures, oxygen, and humidity, which adversely affects the performance and longevity of the associated solar cells. In contrast, all-inorganic perovskites demonstrate superior stability under these conditions and offer photoelectric properties comparable to those of their hybrid counterparts. The potential of tandem solar cells (TSCs) made from all-inorganic perovskites is especially promising. This review is the first to address recent advancements in TSCs that use all-inorganic perovskites and crystalline silicon (c-Si), both domestically and internationally. This work provides a systematic and thorough analysis of the current challenges faced by these systems and proposes rational solutions. Additionally, we elucidate the regulatory mechanisms of all-inorganic perovskites and their TSCs when combined with c-Si, summarizing the corresponding patterns. Finally, we outline future research directions for all-inorganic perovskites and their TSCs with c-Si. This work offers valuable insights and references for the continued advancement of perovskite-based TSCs.

In recent years, a novel PEDOT:PSS/n-Si planar heterojunction solar cell has been extensively studied in the photovoltaic field. Different V₂O₅-IPA concentrations mixed in PEDOT:PSS samples as hole transport layer were prepared by means of spin coating technique and mechanical mixing of organic and inorganic materials. V₂O₅ was studied for its effects on the surface morphology, chemical composition, and optical transmittance of PEDOT:PSS films. The findings of the study show that the addition of V₂O₅ particles changes the surface morphology of PEDOT:PSS films and promotes its superior ohmic contact with the Si interface. Furthermore, PEDOT:PSS incorporated with V₂O₅ particles that have outstanding optical and semiconductor properties reduces the rate of carrier recombination at the device interface and blocks electron transport to the anode in the fabricated Si-based solar cells. When compared to conventional PEDOT:PSS/Si planar heterojunction solar cells, the fill factor, photoelectric conversion efficiency, open-circuit voltage, and short-circuit current density of the devices prepared in this study can be significantly improved, reaching up to 70.98%, 15.17%, 652 mV and 32.8 mA/cm², respectively. This research provides a promising and effective method for improving the photoelectric conversion performance of PEDOT:PSS/Si heterojunction solar cells, which enables the application of V₂O₅ in Si solar cells.