신성식 교수

Abstract One of the most effective methods to achieve high‐performance perovskite solar cells (PSCs) is to employ additives as crystallization agents or to passivate defects. Tri‐iodide ion has been known as an efficient additive to improve the crystallinity, grain size, and morphology of perovskite films. However, the generation and control of this tri‐iodide ion are challenging. Herein, an efficient method to produce tri‐iodide ion in a precursor solution using a photoassisted process for appl

Surface reconstruction, reorganizing the surface atoms or structure, is a promising strategy to manipulate materials' electrical, electrochemical, and surface catalytic properties. Herein, a rapid surface reconstruction of indium sulfide (In₂S₃) is demonstrated via a high-temperature flame treatment to improve its charge collection properties. The flame process selectively transforms the In₂S₃ surface into a diffusionless In₂O₃ la

Hybrid perovskite solar cells (PSCs) with high average visible transmission (AVT) are applicable to building-integrated photovoltaics (BIPV) and windows.

Abstract A power conversion efficiency (PCE) exceeding 25% is achievable using perovskite solar cells (PSCs), with compositional engineering as the most effective strategy for high‐efficiency PSCs. However, the understanding of structural properties, charge‐carrier dynamics, and photoelectric properties, crucial for solar cell performance, still remains insufficient to establish a correlation with device performance for improving the PCE and stability of PSCs. This study uncovers the crucial lin

Abstract In perovskite solar cells (PSCs), expensive gold or silver metal has traditionally been utilized as the rear electrode for highly efficient performance. In this context, carbon nanotube (CNT) electrodes have been considered promising rear electrodes because of their excellent electrical conductivity, mechanical strength, and chemical stability in PSCs. Despite these favorable characteristics, concerns have been raised about the power conversion efficiency (PCE) and stability of PSCs bas

Abstract Indoor photovoltaics are limited by their inherently low‐photogenerated carrier density, leading to heightened carrier recombination and adverse leakage currents compared with conventional solar cells operating under 1 sun condition. To address these problems, this work incorporates a porous insulating interlayer (Al 2 O 3 ) in perovskite devices, which effectively mitigates recombination and parasitic leakage current. A systematic investigation of the relationship between shunt resista

Three-dimensional (3D) urchin-like rutile TiO2 powders were synthesized by a mild hydrothermal method without any templates. An individual urchin-like TiO2 powder consists of self-assembled nanorods with a length of about 150 nm and width of about 10 nm. Additionally, the urchin-like TiO2 nanopowders were coated with an ultra-thin ZnO layer in order to modify the surface properties of the nanopowders, and the ZnO layer was confirmed by high-resolution transmission electron microscopy (HRTEM) and

Abstract Device production costs must be reduced to achieve commercializatio hybrid perovskite solar cells (PSCs). Carbon‐based materials are promising alternatives to conventional noble metal top electrodes and offer cost‐effective solutions. However, the performance of PSCs employing carbon‐based top electrodes is inferior to that using gold electrodes, primarily because of suboptimal interfacial design. In this study, an inorganic nanospacer (NS) is introduced at the interface between a perov