PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
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2026
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IF 2.5
Junying Yu,Yahong Wang,Peng Ye,Luming Zhou,Yingrui Chen,Lin He,Rongli Gao,Chunlin Fu
Enhancing the power conversion efficiency of solar cells requires effective utilization of the full solar spectrum. In this work, we develop PbS/MAPbI 3 core-shell nanorod arrays that integrate the light-trapping and directional charge-transport benefits of nanorod architectures with the strong visible-light absorption of perovskites and the near-infrared response of PbS quantum dots (QDs). A key challenge lies in mitigating heterointerface defects, which we address by passivating the PbS QD surface with methylammonium iodide (MAI)—a strategy that simultaneously reduces surface defects and modulates perovskite crystallization. We identify the concentration of MAI-passivated PbS QDs as a critical parameter governing interfacial morphology, which in turn determines perovskite film quality, defect density, and charge dynamics. Systematic optimization over a concentration range of 40-100 mg/mL reveals that a concentration of 60 mg/mL yields a uniform and continuous QD interlayer. This optimal interlayer promotes high-quality MAPbI 3 growth, reduces defect density, and effectively suppresses non-radiative recombination—as confirmed by the minimized Urbach energy (0.102 eV) and maximized recombination resistance (20646 Ω). The champion device achieves a power conversion efficiency of 9.09%, with concurrent enhancements in open-circuit voltage and fill factor. Collectively, these results establish a clear relationship between processing conditions, interfacial structure, and device performance in core-shell nanorod solar cells, while elucidating how QD layer morphology governs perovskite crystallization and interfacial carrier dynamics.
✓ 已验证
DOI
高影响因子
Nano Energy
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2019
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IF 15.548
Yanbo Gao,Yanjie Wu,Hongbin Lu,Cong Chen,Yue Liu,Xue Bai,Lili Yang,William W. Yu,Qilin Dai,Yu Zhang
The quality of perovskite absorber is one of the most important factors to influence the efficiency and stability of perovskite solar cells (PSCs). However, it is still challenging to obtain perovskite layers with required properties including large grain sizes, better crystallinity , less grain boundaries, and uniform morphology by the current preparation techniques. Here we develop a novel method, where the CsPbBr 3 nanoparticles (NPs) are introduced into the chlorobenzene anti-solvent to improve the MAPbI 3 film quality in terms of film structure, morphology and crystallinity, leading to reduced charge recombination and improved charge transfer. CsPbBr 3 NPs play a role as nucleation centers in the growth process of perovskite films, and CsPbBr 3 NPs also induce a passivation layer Cs 1-y MA y PbI 3-x Br x on the top of perovskite layer. The charge transport and power conversion efficiency (PCE) are improved due to the introduction of CsPbBr 3 NPs. A champion PCE of 20.46% is obtained for the PSCs based on high quality perovskite film prepared with CsPbBr 3 NPs. In addition, the PSCs with CsPbBr 3 NPs also exhibit improved stability. This work not only demonstrates a novel strategy to prepare high quality perovskite films for PSCs with high efficiency and stability, but also provides important insight in the growth mechanisms of perovskite films toward high crystallinity and less defects.
研究领域:
材料科学
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可再生能源
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纳米技术
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光伏
✓ 已验证
DOI
高影响因子
Small Methods
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2025
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IF 9.1
Yueyan Wang,Yuhan Ma,Yongqi Zhang,Ruilin Liu,Luzhen Li,Naiwen Zhang,Peijie Wang,Lisheng Zhang
Methylammonium lead iodide (MAPbI 3 ) has been considered as the most influential component to boost the rapid development of perovskite photovoltaic devices during the past decade. However, the volatility of organic compounds (Methylammonium ions) causes excessive residual PbI 2 during the fabrication and storage process of MAPbI 3 films. The doping of various reduced graphene oxide (L-AA-rGO) is systematically induced into MAPbI 3 precursor ink to regulate the crystallization process, resulting in obtaining a high-quality perovskite film. The higher content of oxygen-containing functional groups (carboxyl and hydroxyl) and flexible sp 3 skeleton structure is successfully obtained in L-AA-rGO(LT), which is favored to form stable coordination bonds with uncoordinated Pb 2+ ions via lone pairs of electrons. Therefore, this functional L-AA-rGO(LT) not only passivates deep-level defects Pb 0 with its functional groups, but also absorbs the perovskite lattice structure with its special sp 3 carbon network to release its residual stress within the perovskite film. This work provides a new method to develop the efficiency and stability of MAPbI 3 perovskite solar cells via doping functional L-AA-rGO.
研究领域:
材料科学
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光伏技术
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纳米材料
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钙钛矿太阳能电池
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薄膜制备
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
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2024
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IF 27.4
Kai Chen,Xufeng Xiao,Jiale Liu,Jianhang Qi,Qiaojiao Gao,Yongming Ma,Yanjie Cheng,Anyi Mei,Hongwei Han
Tailoring multifunctional additives for performing interfacial modifications, improving crystallization, and passivating defects is instrumental for the fabrication of efficient and stable perovskite solar cells (PSCs). Here, a Schiff base derivative, (chloromethylene) dimethyliminium chloride (CDCl), is introduced as an additive to modify the interface between the mesoporous TiO 2 electron transport layer and the MAPbI 3 light absorber during the annealing process. CDCl chemically links to TiO 2 and MAPbI 3 through coordination and hydrogen bonding, respectively, and results in the construction of fast electron extraction channels. CDCl also optimizes the energy-level alignment of the TiO 2 /MAPbI 3 heterojunction and improves the pore-filling and crystallization of MAPbI 3 in the mesoscopic scaffold, which inhibits nonradiative recombination and eliminates open-circuit voltage losses. As a result, an impressive power conversion efficiency of 19.74%, which is the best one ever reported, is obtained for printable carbon-based hole-conductor-free PSCs based on MAPbI 3 .
研究领域:
材料科学
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太阳能
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光伏技术
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有机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2020
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IF 3.085
Zhou Liu,Shuzhen Wu,Xiaojie Yang,Yijun Zhou,Jiaren Jin,Junmei Sun,Li Zhao,Shimin Wang
SnO 2 has attracted extensive attention in planar perovskite solar cells (PSCs) owing to its outstanding photoelectric properties and low temperature preparation. However, pinholes are easy to appear in the annealing process of SnO 2 films, which limits its application in planar PSCs. Here lists a simple and low-cost method: Urea-complexed tin oxide in deionized water can effectively control the concentration of SnO 2 . This process is conducive to forming a compact surface morphology . Meanwhile, the work explored the effect of the properties of PSCs with different thicknesses of SnO 2 layers. The system analysis showed that PSCs based on 60 nm SnO 2 layer and the methamphetamine lead iodide (MAPbI 3 ) light absorber yielded the highest power conversion efficiency (PCE) over 18%, a fill factor ( FF ) of 0.793, and good stability. Therefore, we believe our study provides an effective way for preparing electron transport layers.
研究领域:
材料科学
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可再生能源
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太阳能电池
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光伏技术
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
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2023
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IF 3.9
Mengmeng Zhu,Shulan Zhang,Yunpeng Liu,Renjie Chen,Biyu Long,Nannan He,Jun Ren,Sumei Huang,Xiaohong Chen,Huili Li
The quality of the perovskite active layer is the critical factor that affects the photovoltaic performance of perovskite solar cells (PSCs). In this paper, the 8-hydroxyquinoline lead (Pbq 2 ) containing pyridine bonds, C–O bonds, and quinoline ring groups was introduced into the MAPbI 3 perovskite layer to improve the performances and stabilities of PSCs. The doped Pbq 2 could adjust the growth of perovskite crystals by coordinating interactions between the above functional groups in Pbq 2 with Pb 2+ , MA + , and I − in perovskite together. And as a result, high-quality and dense perovskite films with larger grain sizes were obtained. At the same time, large molecule-sized Pbq 2 chelated at the grain boundary of perovskite, which passivated the defects and suppressed non-radiative recombination of photo carriers and ion migration at grain boundaries. Therefore, the interface energy barrier between the perovskite layer and the electron transfer layer (ETL) was reduced by the Pbq 2 doping, which accelerated the separation and transportation of carriers at the ETL/perovskite layer interface. Finally, Pbq 2 -modified PSCs achieved a power conversion efficiency (PCE) of 20.82% with an open circuit voltage (V oc ) of 1.144 V and a fill factor (FF) of 77.4% compared to a PCE of 17.87% for the reference sample. Furthermore, Pbq 2 -modified PSCs showed better light stability and moisture resistance in air conditions.
研究领域:
材料科学
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可再生能源
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2016
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IF 4.732
Xuan Liu,Xinxin Xia,Qiuquan Cai,Feilong Cai,Liyan Yang,Yu Yan,Tao Wang
We report efficient, planar heterojunction perovskite solar cells prepared via bar coating that are compatible with large-scale fabrication on flexible substrates . Our MAPbI 3 perovskite devices by bar coating method achieved a maximum power conversion efficiency (PCE) of 13.0% using a ITO/PEDOT: PSS/CH 3 NH 3 PbI 3 (MAPbI 3) /PCBM/Ag structure, and there is very weak hysteresis in these devices. After formulation of the precursor solution and optimization of the coating process , planar perovskite thin films containing large-size grains with low surface roughness were obtained. We found that anti-solvent plays an important role in determining the uniformity, size of grains and width of grain boundaries in perovskite films. The addition of 5 vol% isopropanol into the precursor solution leads to the formation of large aspect ratio grains with a length ca. 200 µm and width of a few hundred nanometers , together with narrow grain boundaries. However, the absence or excessive of isopropanol result in perovskite films with high surface roughness and broad grain boundaries due to inefficient crystal growth or the formation of ridges between crystal grains. These grain boundaries have high PL intensity due to charge recombination and consequently deteriorate device efficiency. When bar-coating the perovskite films in air, best devices with PCE over 11% can be achieved with a relatively high humidity around 50%, eliminating the low humidity requirement during air processing.
研究领域:
材料科学
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太阳能
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纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）