Perovskite solar cell

About: Perovskite solar cell is a research topic. Over the lifetime, 4701 publications have been published within this topic receiving 216807 citations. The topic is also known as: PSC.

Long-term stable silver nanowire transparent composite as bottom electrode for perovskite solar cells

Abstract: As the most promising alternative to traditional indium tin oxide (ITO), silver nanowire (AgNW) composite transparent electrodes with improved stabilities compared with that of the pristine AgNWs networks have been demonstrated in various devices. However, a stable AgNW/polymer composite as the bottom electrode for perovskite solar cells has not yet been reported. Here, a long-term stable, smooth AgNW composite with an antioxidant-modified chitosan polymer was developed. The modified polymer can effectively protect pristine AgNWs from side reactions with perovskite, whereas it does not block the carrier drift through the interface of the insulating polymer. The as-prepared AgNW/polymer composite electrode exhibited a root mean square roughness below 10 nm at a scan size of 50 μm × 50 μm, and its original sheet resistance did not change obviously after aging at 85 °C for 40 days in air. As a result, the perovskite solar cell employing the composite as the bottom electrode yielded a power conversion efficiency of 7.9%, which corresponds to nearly 75% of that of the reference device with an ITO electrode.

Evolution of Diffusion Length and Trap State Induced by Chloride in Perovskite Solar Cell

Abstract: Chloride (from PbCl2 or CH3NH3Cl) has been reported to improve the morphology of perovskite thin film and power conversion efficiency (PCE) of corresponding perovskite solar cells (PSCs). However, the mechanism why chloride functions well in perovskite is unclear. In this work, we investigate the effects of chloric additive (from CH3NH3Cl) on the morphology, diffusion length, and trap state of perovskite thin film, as well as the PCE of PSC. We find that the chloric additive can significantly increase the hole and electron diffusion length and also reduce the bulk trap-state density in perovskite thin film, which is considered to be the main reason for improving the performance of PSC. These results contribute to better understanding of the function of chloride in perovskite and suggest room to further improve the PCE of PSC via decreasing the trap state in perovskite film.

Enhanced Performance of Planar Perovskite Solar Cell by Graphene Quantum Dot Modification

Abstract: In organic–inorganic halide perovskite solar cells (PSCs), the perovskite layer is the main source of photogenerated electron–hole pairs. Therefore, the premier concern in PSCs is to improve the quality of the perovskite film (PF). In the present research, graphene quantum dots (GQDs) were prepared and incorporated in the perovskite precursor, and due to the merits of dangling bonds, quantum size, and excellent electronic conductivity of GQDs, PF of higher-quality with flat surface and pinhole-free hallmarks was garnered. It is delightful that the PFs with GQDs exhibit higher light absorption and faster charge extraction. Consequently, the power conversion efficiency (PCE) of PSCs incorporating GQDs achieves an improvement of 11% compared with the pristine ones. Our work confirms that incorporating GQDs is a viable approach to obtain high-quality PF with more efficient charge extraction for superior planar PSCs.

A mesoporous nickel counter electrode for printable and reusable perovskite solar cells

Abstract: A mesoporous nickel layer is used as the counter electrode in printable perovskite solar cells. A unique reuse process is realized in such perovskite solar cell devices by repeated loading of the perovskite material. Under standard AM1.5 illumination, the fresh device shows a promising power conversion efficiency of 13.6%, and an efficiency of 12.1% is obtained in the reused devices.