Double‐Side Passivation of Perovskite Solar Cells for High Performance and Stability

Abstract

Perovskite solar cells (PSCs) are in the spotlight as promising renewable energy devices by their appealing properties. However, they face challenges both in power conversion efficiency (PCE) and long‐term stability. The presence of surface defects in the PSCs is a significant obstacle to achieving both high efficiency and stability, as these defects cause nonradiative recombination and degradation. Herein, a novel double‐side surface passivation method using phenyltrimethylammonium iodide (PTMAI) salt is applied to remove electronic defects effectively. Furthermore, double‐side passivation with PTMAI contributes to the enhancement of the perovskite crystallinity with the relaxed non‐uniform distribution of local strains. Finally, the efficiency of PSC is significantly improved by double‐side passivation with PTMAI, achieving a PCE of 21.87%. Furthermore, the passivated cell exhibited enhanced long‐term stability, maintaining over 80% of initial PCE after 1860 and 1030 h under 60 °C and 1 sun illumination, respectively.

Recent Developments in Atomic Layer Deposition of Functional Overlayers in Perovskite Solar Cells

“…While analogous surface passivation concepts have been successfully demonstrated by generating a two-dimensional perovskite layer on the surface of a three-dimensional perovskite layer using solution processing [37], researchers have also explored the effectiveness of various barrier layers created via ALD. These ALD-deposited barrier layers exhibit notable improvements in device stability when exposed to moisture and light.…”

Toward Ultra-High Sensitivity Optical Thermometers and Bright Yellow LEDs Based on Phonon-Assisted Energy Transfer in Rare Earth-Doped La2ZnTiO6 Double Perovskite

“…Double perovskite materials have long been a focus of materials science due to their exceptional performance in various applications. These materials have proven to be crucial not only in solar cells but also in LED lighting, lasers, sensor, and magnetic storage. − Perovskite solar cells, for instance, have emerged as an important component of the clean energy transition, offering high photoelectric conversion efficiencies and cost-effective manufacturing methods, thus providing new prospects for sustainable energy development . In addition, double perovskite materials have facilitated the development of efficient magnetic materials and the creation of high-brightness, long-lasting LED light sources, making significant contributions to advancements in energy efficiency and lighting technology .…”

“…1−5 Perovskite solar cells, for instance, have emerged as an important component of the clean energy transition, offering high photoelectric conversion efficiencies and cost-effective manufacturing methods, thus providing new prospects for sustainable energy development. 6 In addition, double perovskite materials have facilitated the development of efficient magnetic materials and the creation of high-brightness, long-lasting LED light sources, making significant contributions to advancements in energy efficiency and lighting technology. 7 At the same time, the abundance of phonon energy in certain oxide-type double perovskites makes it possible to successfully realize entirely new energy transfer channels, thus improving the overall performance of the material.…”

Management of the π-Conjugated System in Carbazole–Diphenylamine Derivative-Based Hole-Transporting Materials for Perovskite Solar Cells: Theoretical Simulation and Experimental Research

“…Perovskite solar cells (PSCs), as a new generation of photovoltaic technology, have achieved a remarkable power conversion efficiency (PCE) exceeding 26% . Perovskites possess unique light-capturing capabilities, extended diffusion lengths, a small band gap, and high charge carrier mobility, garnering widespread attention and in-depth research in the scientific community. − Typically, in conventional n–i–p-type PSCs, the perovskite active layer is situated between the hole transport layer (HTL) and the electron transport layer (ETL). Serving as the p-type interlayer atop the perovskite layer, hole transport materials (HTMs) can assist in suppressing the recombination of photogenerated charge carriers, facilitating the extraction and transfer of holes, and promoting the stability of PSCs. − Therefore, rational molecular design of HTMs is significant to obtain potential HTMs for improvement of PSC performance.…”