Topic
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.
Papers
More filters
TL;DR: A deeper understanding of the crystallizing procedure of perovskite during the one-step spin-coating process is provided and there are intermolecular hydrogen-bonding forces between anisole and DMF/DMSO that play critical roles in the wide process window.
Abstract: Photovoltaic technologies based on perovskite absorber materials have led this optoelectronic field into a brand-new horizon. However, the present antisolvents used in the one-step spin-coating method always encounter problems with the very narrow process window. Herein, anisole is introduced into the one-step spin-coating method, and the technology is developed to fabricate perovskite thin films with ultrawide processing window with a dimethylformamide (DMF):dimethyl sulfoxide (DMSO) ratio varying from 6:4 to 9:1 in the precursor solution, anisole dripping time ranging from 5 to 25 s, and an antisolvent volume varying from 0.1 to 0.9 mL. Perovskite thin films as large as 100 cm2 are successfully fabricated using this method. Maximum photoelectric conversion efficiencies of 19.76% for small-area (0.14 cm2 ) and 17.39% for large-area (1.08 cm2 ) perovskite solar cell devices are obtained. It is also found that there are intermolecular hydrogen-bonding forces between anisole and DMF/DMSO that play critical roles in the wide process window. These results provide a deeper understanding of the crystallizing procedure of perovskite during the one-step spin-coating process.
114 citations
114 citations
TL;DR: The herein demonstrated improvements of multilayer selective contacts may serve as a general design guideline for perovskite solar cells.
Abstract: Solar cells made from inorganic–organic perovskites have gradually approached market requirements as their efficiency and stability have improved tremendously in recent years. Planar low-temperature processed perovskite solar cells are advantageous for possible large-scale production but are more prone to exhibiting photocurrent hysteresis, especially in the regular n–i–p structure. Here, a systematic characterization of different electron selective contacts with a variety of chemical and electrical properties in planar n–i–p devices processed below 180 °C is presented. The inorganic metal oxides TiO2 and SnO2, the organic fullerene derivatives C60, PCBM, and ICMA, as well as double-layers with a metal oxide/PCBM structure are used as electron transport materials (ETMs). Perovskite layers deposited atop the different ETMs with the herein applied fabrication method show a similar morphology according to scanning electron microscopy. Further, surface photovoltage spectroscopy measurements indicate comparabl...
114 citations
TL;DR: In this article, the authors demonstrate that the crystallinity, transparency, and electrical properties of NiO films are well controlled by pulsed laser deposition, which determines the photovoltaic performance of CH3NH3PbI3−xClx-based perovskite solar cells with NiO film as the hole transport layers.
Abstract: Pulsed laser deposition (PLD) is a powerful growth technique for thin films, where in situ doping and post-thermal annealing are the most effective ways to tune the crystalline and physical properties of the deposited films. This paper demonstrates that the crystallinity, transparency, and electrical properties of NiO films are well controlled by PLD, which determines the photovoltaic performance of CH3NH3PbI3−xClx-based perovskite solar cells with NiO films as the hole transport layers (HTLs). After post-annealing, the NiO films exhibit enhanced in-plane crystal orientation, high transmittance, and uniform surface morphology, and, accordingly, the power conversion efficiency (PCE) of the perovskite solar cell improves from 5.38% to 12.59%. Moreover, by doping the ablated target with lithium (Li), PLD can produce doped NiO:Li films with significantly enhanced electrical conductivity, which further improves the perovskite cell PCE from 12.59% to 15.51%. These results highlight the importance of optimizing the transporting layer properties toward high-performance inverted perovskite planar solar cells.
114 citations
TL;DR: In this article, high-efficiency mesoporous SnO2 (m-SnO2) perovskite solar cells are fabricated by doping SnO 2 with gallium, yielding devices that can compete with TiO2 based devices in terms of performance.
Abstract: Increasing the stability of perovskite solar cells is a major challenge for commercialization. The highest efficiencies so far have been achieved in perovskite solar cells employing mesoporous TiO2 (m-TiO2). One of the major causes of performance loss in these m-TiO2-based perovskite solar cells is induced by UV-radiation. This UV instability can be solved by replacing TiO2 with SnO2; thus developing a mesoporous SnO2 (m-SnO2) perovskite solar cell is a promising approach to maximise efficiency and stability. However, the performance of mesoporous SnO2 (m-SnO2) perovskite solar cells has so far not been able to rival the performance of TiO2 based perovskite solar cells. In this study, for the first time, high-efficiency m-SnO2 perovskite solar cells are fabricated, by doping SnO2 with gallium, yielding devices that can compete with TiO2 based devices in terms of performance. We found that gallium doping severely decreases the trap state density in SnO2, leading to a lower recombination rate. This, in turn, leads to an increased open circuit potential and fill factor, yielding a stabilised power conversion efficiency of 16.4%. The importance of high-efficiency m-SnO2 based perovskite solar cells is underlined by stability data, showing a marked increase in stability under full solar spectrum illumination.
114 citations