The environmental challenges across the world step up the researcher's interest in different energy resources. Semitransparent perovskite solar cells (ST‐PSCs) could expedite generation of electricity as well as shows reassuring its significance in flexible electronics and building‐integrating photovoltaic as so forth in the next decade. It is highly recommended to endorse the relevance of semitransparent solar devices to fulfill the required level of energy even by using the roofs and windows of the buildings. In this review article, we pay more attention to recent developments of ST‐PSCs. Herein, a succinct overview of latest research about semitransparent solar cell technologies and ST‐PSCs is summarized. Moreover, the strategies to enhance the transparency of solar cells are described utilizing structure, transparent electrodes, perovskite film formation, tandem solar cells, color tuning, and human eye perception. Last but not least is that the serious concerns about stability of ST‐PSCs are vividly reviewed. image

Perovskite-based materials have attracted considerable attention in photoelectric devices. In this paper, we report the one-step fabrication of spin-coated CsPbBr_2.5I_0.5 perovskite films doped with PAN (polyacrylonitrile) polymer. A red perovskite LED (PeLED) composite film was fabricated which featured a maximum luminance value of 657 cd/m² at 8 V. We fabricated white PeLEDs by combining hole transporting layer material emission, perovskite–polymer composite material PAN:CsPbBr_2.5I_0.5, and pure inorganic perovskite CsPbBr₃ as a luminescent layer. The maximum luminance of the device was 360 cd/m² at 7 V, and the color coordinate was (0.31, 0.36). We obtained an ideal white light-emitting device that paves the way for further development of white PeLEDs.

Low-temperature atomic layer deposition (ALD) is increasingly used in the field of organic optoelectronics. However, the deposition of ALD outside the temperature window still cannot be stably implemented. In this study, transient steric hindrance caused by gas-phase molecules at low-temperature (80 °C and 30 °C) was investigated. In order to mitigate the effect of this transient hindrance, a process of consecutive short-pulses was adopted in our experiments. As a result, the density of Alucone films increased from 2.21 g/cm³ to 2.37 g/cm³ and the density of room-temperature deposited Al₂O₃ films increased 28.6% from 2.41 g/cm³ to 3.1 g/cm³. Overall, the proposed idea would help low-temperature ALD become mature and be widely promoted.