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.
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TL;DR: In this paper, an innovative method to post-treat a carbon electrode with phenylethylammonium iodide (PEAI) for the growth of a two-dimensional (2D) perovskite at the interface between the perovsite and carbon layers was presented.
Abstract: Carbon electrode-based perovskite solar cells (PSCs) without hole transport materials (HTMs) are regarded as a promising alternative architecture to realize low-cost, stable photovoltaics. However, poor hole transport and severe charge recombination at the interface of perovskite and carbon layers degrade the power conversion efficiency (PCE) of carbon-based PSCs. Here we report on an innovative method to post-treat a carbon electrode with phenylethylammonium iodide (PEAI), for the growth of a two-dimensional (2D) perovskite at the interface between the perovskite and carbon layers. The resulting ultrathin PEA2PbI4 layer formed within the perovskite/carbon interface improved the poor perovskite/carbon contact. The favorable conduction and valence energy levels of the 2D perovskite interlayer greatly suppressed interfacial charge recombination, which stems from the absence of an HTM. Using our fabrication method, the average PCE of devices was boosted from 11.5% to 14.5% with minimal hysteresis loss, and a maximum PCE of 15.6% was achieved. Moreover, the PEAI-treated devices showed excellent ambient stability. The dual protection of the hydrophobic carbon and 2D perovskite layers enabled the device to retain 92% of its initial PCE after 1000 h of exposure to ambient conditions (relative humidity: 40 ± 5%). The thermal stability of the devices was also enhanced, showing no efficiency loss after thermal testing at 150 °C, due to suppressed ion migration.
68 citations
TL;DR: A carbon nanotube (CNT) bridging method is introduced into the devices by adding single-walled CNTs (SWCNTs) in both perovskite and carbon layers to form a high-quality perovSkite/carbon interface, which makes highly stable and efficient C-PSCs promising candidates for future applications.
Abstract: The incredible stability of carbon-based perovskite solar cells (C-PSCs) has aroused enormous interest. However, for the paintable C-PSCs, the fill factor (FF) and power conversion efficiency (PCE) remain low, which is because of the insufficient contact at the interface between the perovskite and the electrode and the low conductivity of the electrode. In this work, a carbon nanotube (CNT) bridging method is introduced into the devices by adding single-walled CNTs (SWCNTs) in both perovskite and carbon layers to form a high-quality perovskite/carbon interface. The CNT bridges penetrating into both the CH3NH3PbI3 layer and the carbon cathode not only facilitate charge extraction and transport between the two layers but also promote the electrical conductivity of the carbon electrode. The hole transport layer-free C-PSC with a structure of fluorine-doped tin oxide/compact TiO2/mesoporous TiO2/CH3NH3PbI3-SWCNT/SWCNT-C gained a remarkable PCE of 15.73% with an FF of 0.72, accompanied by an outstanding stability of 90 days in the dark under high-humidity [65 ± 5% relative humidity (RH), 25 ± 5 °C] and high-temperature (75 ± 5 °C, 25 ± 5% RH) conditions. The low-cost fabrication process makes highly stable and efficient C-PSCs promising candidates for future applications.
68 citations
TL;DR: In this paper, the elastic perovskite solar cells, for the first time, have been realized by designing a stretchable nanostructured fiber and spring-like modified Ti wire as two electrodes with perov-skite materials coated on the modified Ti wires based on a solution process.
Abstract: Perovskite solar cells have attracted increasing attention due to the possibility of flexible devices compared with silicon-based photovoltaic cells and high energy conversion efficiencies compared with organic photovoltaic cells. Although they have been widely explored in recent years, elastic perovskite solar cells, for the first time, have been realized here by designing a stretchable nanostructured fiber and spring-like modified Ti wire as two electrodes with perovskite materials coated on the modified Ti wire based on a solution process. The elastic perovskite solar cell appears in a fiber format and maintains stable energy conversion efficiencies under stretching.
68 citations
TL;DR: This work demonstrates that lithium and silver co-doping is a promising route for realizing efficient p-type NiO x HTL, which provides a simple way to boost the efficient and stable of inverted planar PSCs.
Abstract: In this work, a lithium and silver co-doping strategy has been successfully implied to prepare NiOx films for high performance inverted planar perovskite solar cells (PSCs). Compared to the pristine and single-doped NiOx, the Li and Ag co-doping approach exhibits the synergistic effect and can endow NiOx films with higher electrical conductivity, higher hole mobility and better interface energy band alignment with perovskite active layers. Moreover, the perovskite film with enhanced crystallinity can be obtained induced by the Li,Ag:NiOx film. The PSC with Li,Ag:NiOx HTL shows a high power conversion efficiency (PCE) up to 19.24% and less hysteresis effect, which outperforms the devices with the pristine NiOx or single-doped NiOx HTLs. Meanwhile, the Li,Ag:NiOx device can retain 95% of its initial PCE after storage at the relative humidity of 30 ± 2% in 30 days without encapsulation. Our work demonstrates that lithium and silver co-doping is a promising route for realizing efficient p-type NiOx HTL, which...
68 citations
TL;DR: In this article, polystyrene (PS) is introduced to stabilize the perovskite component, grains and microstructures by forming PS-capped perovsite grains.
68 citations