scholarly journals Efficient and stable inverted perovskite solar cells with very high fill factors via incorporation of star-shaped polymer

2021 ◽  
Vol 7 (28) ◽  
pp. eabg0633
Author(s):  
Qi Cao ◽  
Yongjiang Li ◽  
Hong Zhang ◽  
Jiabao Yang ◽  
Jian Han ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Large Scale ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Significant Loss ◽  
Operating Conditions ◽  
Nonradiative Recombination ◽  
Star Shaped Polymer ◽  
Very High

Stabilizing high-efficiency perovskite solar cells (PSCs) at operating conditions remains an unresolved issue hampering its large-scale commercial deployment. Here, we report a star-shaped polymer to improve charge transport and inhibit ion migration at the perovskite interface. The incorporation of multiple chemical anchor sites in the star-shaped polymer branches strongly controls the crystallization of perovskite film with lower trap density and higher carrier mobility and thus inhibits the nonradiative recombination and reduces the charge-transport loss. Consequently, the modified inverted PSCs show an optimal power conversion efficiency of 22.1% and a very high fill factor (FF) of 0.862, corresponding to 95.4% of the Shockley-Queisser limited FF (0.904) of PSCs with a 1.59-eV bandgap. The modified devices exhibit excellent long-term operational and thermal stability at the maximum power point for 1000 hours at 45°C under continuous one-sun illumination without any significant loss of efficiency.

scholarly journals Microscopic origins of performance losses in highly efficient Cu(In,Ga)Se2 thin-film solar cells

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Maximilian Krause ◽  
Aleksandra Nikolaeva ◽  
Matthias Maiberg ◽  
Philip Jackson ◽  
Dimitrios Hariskos ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
High Efficiency ◽  
Significant Loss ◽  
Thin Film Solar Cells ◽  
Limiting Factors ◽  
Nonradiative Recombination ◽  
Loss Mechanism ◽  
Substantial Impact ◽  
Very High

Abstract Thin-film solar cells based on polycrystalline absorbers have reached very high conversion efficiencies of up to 23-25%. In order to elucidate the limiting factors that need to be overcome for even higher efficiency levels, it is essential to investigate microscopic origins of loss mechanisms in these devices. In the present work, a high efficiency (21% without anti-reflection coating) copper indium gallium diselenide (CIGSe) solar cell is characterized by means of a correlative microscopy approach and corroborated by means of photoluminescence spectroscopy. The values obtained by the experimental characterization are used as input parameters for two-dimensional device simulations, for which a real microstructure was used. It can be shown that electrostatic potential and lifetime fluctuations exhibit no substantial impact on the device performance. In contrast, nonradiative recombination at random grain boundaries can be identified as a significant loss mechanism for CIGSe solar cells, even for devices at a very high performance level.

Fundamental physics behind high-efficiency organo-metal halide perovskite solar cells

2015 ◽  
Vol 3 (30) ◽  
pp. 15372-15385 ◽  
Author(s):  
Yu-Che Hsiao ◽  
Ting Wu ◽  
Mingxing Li ◽  
Qing Liu ◽  
Wei Qin ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Excited States ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Metal Halide ◽  
Fundamental Physics ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

Polarization and spin-dependent excited states and charge transport.

Universal approach toward high-efficiency two-dimensional perovskite solar cells via a vertical-rotation process

2020 ◽  
Vol 13 (9) ◽  
pp. 3093-3101 ◽  
Author(s):  
Yi Yang ◽  
Cheng Liu ◽  
Arup Mahata ◽  
Mo Li ◽  
Cristina Roldán-Carmona ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Transport Properties ◽  
Crystal Orientation ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Two Dimensional ◽  
Universal Approach

A universal vertically-rotated (VR) methodology is proposed to rotate the crystal orientation of 2D perovskites, which improves charge transport properties by several orders of magnitude and boosts the efficiency of 2D (n ≤ 4) PSCs to above 17%.

scholarly journals Strategies for High-Performance Large-Area Perovskite Solar Cells toward Commercialization

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 295
Author(s):  
Tianzhao Dai ◽  
Qiaojun Cao ◽  
Lifeng Yang ◽  
Mahmoud Aldamasy ◽  
Meng Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Large Scale ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Growth Control ◽  
Single Crystal Silicon ◽  
Large Area ◽  
Crystal Silicon ◽  
Control Interface

Perovskite solar cells (PSCs) have received a great deal of attention in the science and technology field due to their outstanding power conversion efficiency (PCE), which increased rapidly from 3.9% to 25.5% in less than a decade, comparable to single crystal silicon solar cells. In the past ten years, much progress has been made, e.g. impressive ideas and advanced technologies have been proposed to enlarge PSC efficiency and stability. However, this outstanding progress has always been referred to as small-area (<0.1 cm2) PSCs. Little attention has been paid to the preparation processes and their micro-mechanisms for large-area (>1 cm2) PSCs. Meanwhile, scaling up is an inevitable way for large-scale application of PSCs. Therefore, we firstly summarize the current achievements for high efficiency and stability large-area perovskite solar cells, including precursor composition, deposition, growth control, interface engineering, packaging technology, etc. Then we include a brief discussion and outlook for the future development of large-area PSCs in commercialization.

scholarly journals Processing and Preparation Method for High-Quality Opto-Electronic Perovskite Film

2021 ◽  
Vol 8 ◽  
Author(s):  
Zheng Chen ◽  
Ping He ◽  
Dan Wu ◽  
Chen Chen ◽  
Muhammad Mujahid ◽  
...  
Keyword(s):  
Solar Cells ◽  
Vapor Deposition ◽  
Large Scale ◽  
High Efficiency ◽  
Preparation Method ◽  
Perovskite Solar Cells ◽  
Scale Production ◽  
Film Morphology ◽  
Technical Requirements ◽  
Coating Method

The key to improving the energy conversion efficiency of perovskite solar cells lies in the optimization of the film morphology. The optical and electrical properties of the perovskite film, such as light absorption, carrier diffusion length, and charge transport, are all directly affected by the film morphology. Therefore, this review starts from the perovskite solar cells structure, and it summarizes the state-of-art perovskite film fabrication technologies and the caused film morphology to the performance perovskite solar cells. The spin coating method has an enormous waste of materials and only a small area of the device can be utilized. It is difficult to be used in commercial manufacturing. However, due to the high efficiency of this preparation method, it is irreplaceable in the initial research and development of perovskite materials, and so this method will be popular for a long time in the laboratory. Chemical vapor deposition and thermal vapor deposition have high technical requirements and a good repeatability of processing and manufacturing, and large-scale production can be realized. It may be the first technology to admit industrial application; the scratch coating method and slot-die have significant technical aspects. The similarity of the roll-to-roll manufacturing technology is also an efficient preparation method. Still, to achieve high-efficiency devices, it is necessary to consider the thickness control of each functional layer, and to find or prepare perovskite paste. Finally, we summarized the various fabrication processes and the prospects for the commercialization of perovskite solar cells. We predict that to achieve the commercialization of perovskite solar cells, the existing fabrication technologies should be optimized and more studies should be conducted.

CaI2: a more effective passivator of perovskite films than PbI2 for high efficiency and long-term stability of perovskite solar cells

2018 ◽  
Vol 6 (17) ◽  
pp. 7903-7912 ◽  
Author(s):  
Chuanliang Chen ◽  
Yao Xu ◽  
Shaohang Wu ◽  
Shasha Zhang ◽  
Zhichun Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Term Stability ◽  
Long Term Stability ◽  
Additive Content ◽  
Crystal Grains ◽  
Very High

Much less additive content of 0.5% CaI2 instead of 5% PbI2 was incorporated into the CH3NH3PbI3 film and a dense and surface-smooth morphology was obtained with much enlarged crystal grains. The champion PSC based on MAPbI3(CaI2)0.005 layer demonstrated a very high PCE of 19.3% with superior long-term stability.

scholarly journals Recent progress in perovskite solar cells: the perovskite layer

2020 ◽  
Vol 11 ◽  
pp. 51-60 ◽  
Author(s):  
Xianfeng Dai ◽  
Ke Xu ◽  
Fanan Wei
Keyword(s):  
Solar Cells ◽  
High Speed ◽  
Large Scale ◽  
Recent Progress ◽  
High Efficiency ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Perovskite Layer ◽  
Low Dimensional

Perovskite solar cells (PSCs) are set to be game changing components in next-generation photovoltaic technology due to their high efficiency and low cost. In this article, recent progress in the development of perovskite layers, which are the basis of PSCs, is reviewed. Achievements in the fabrication of high-quality perovskite films by various methods and techniques are introduced. The reported works demonstrate that the power conversion efficiency of the perovskite layers depends largely on their morphology and the crystalline quality. Furthermore, recent achievements concerning the scalability of perovskite films are presented. These developments aim at manufacturing large-scale perovskite solar modules at high speed. Moreover, it is shown that the development of low-dimensional perovskites plays an important role in improving the long-term ambient stability of PSCs. Finally, these latest advancements can enhance the competitiveness of PSCs in photovoltaics, paving the way for their commercialization. In the closing section of this review, some future critical challenges are outlined, and the prospect of commercialization of PSCs is presented.

Evaporation-Induced Self-Assembly of Semi-Crystalline PbI2(DMSO) Complex Films as a Facile Route to Reproducible and Efficient Planar p-i-n Perovskite Solar Cells

MRS Advances ◽  
2018 ◽  
Vol 3 (32) ◽  
pp. 1807-1817 ◽  
Author(s):  
Brandon Dunham ◽  
Vivek Vattipalli ◽  
Christos Dimitrakopoulos
Keyword(s):  
Solar Cells ◽  
Self Assembly ◽  
Large Scale ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Single Step ◽  
Lead Iodide ◽  
Active Layers ◽  
Evaporation Induced Self Assembly ◽  
Complex Film

ABSTRACTHigh quality active layers for hybrid organic-inorganic perovskite solar cells are essential for achieving maximum device performance. However, perovskite active layers in solar cells are frequently prepared with unoptimized processes that lead to layers of inferior quality. This is often the case when research focuses on other aspects of the solar cell device, such as device design and architecture, carrier transport layers, electrodes, interlayers, etc. In this study, a single-step spin-coating method was used to prepare semi-crystalline PbI2(DMSO) complex films via evaporation-induced self-assembly. These optimized intermediate films were then used to form homogeneous methylammonium lead iodide (MAPbI3) perovskite films of optimum thickness (ca. 400 nm) with uniform surface coverage, good crystallinity, high purity, and grain sizes up to one micron, by employing a sequential deposition process involving intramolecular exchange between the PbI2(DMSO) complex film and a methylammonium iodide (MAI) layer deposited on top of it. We found that for certain ranges of MAI concentration, the formation of optimal-quality perovskite active layers was independent of MAI concentration, so long as MAI deposition occurred at specific corresponding spin speeds. Planar p-i-n perovskite solar cells comprising the optimized active layers were fabricated, and they exhibited negligible hysteresis and a maximum power conversion efficiency (PCE) of 16.72%, without any additional compositional and interfacial engineering. The latter can be used in the future to further enhance the PCE. These findings demonstrate the importance of an optimized perovskite active layer for reproducibly fabricating high-efficiency planar p-i-n photovoltaic devices. Additionally, the simplicity of the PbI2(DMSO) complex film preparation and the versatility of the MAI deposition with this fabrication method further enhances the potential of this material for large-scale processing.

Sign in / Sign up

Export Citation Format

Share Document