ELECTROCHIMICA ACTA
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2017
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IF 4.798
Chenxi Zhang,Qi Luo,Xueshuang Deng,Jianfeng Zheng,Wei Ou-Yang,Xiaohong Chen,Sumei Huang
We report an effective method to modulate the perovskite crystallization by incorporating terephthalic acid (TPA) additive into the perovskite precursor solutions. The addition of TPA additive simultaneously facilitate nucleation and modulate the kinetics of crystal growth from solutions , enabling preparation of smooth and compact perovskite morphology with improved crystallization, grain uniformity, loading of perovskite into the TiO 2 mesopores and coverage area. Before deposition of perovskite films, an ultrathin wide bandgap dielectric MgO nanolayer is incorporated onto porous TiO 2 to retard the carrier recombination at the interface in the devices. The mechanism of the interaction between TPA and Pb 2+ on the film-forming process of perovskite crystal was also analyzed. Consequently, by optimizing the TPA concentration, we obtained highly efficient and stable low-temperature processed electron transport material (HTM)-free carbon based perovskite solar cells (PSCs). The performance of the PSCs is significantly improved with the mean efficiency increasing from 11.5% ± 0.67% for the control structure to 14.29% ± 0.37% for the TPA modified structure. Furthermore, the TPA modified perovskite films and devices present much better thermal, UV and ambient air stability than the pristine perovskite films and devices, and the corresponding PSCs with TPA modification show excellent stability with efficiency approaching 94% after being exposed to ambient air for 21 days without encapsulation.
研究领域:
材料科学
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能源研究
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2019
·
IF 1.859
Xunan Shen,Chao Zhang,Yang Feng,Wei Li,Guifeng Chen,Chengchun Tang
In this work, Cu 2 ZnSn(S,Se) 4 thin films were prepared by sol-gel methods based on dimethyl sulfoxide solutions with H 3 BO 3 additive. The morphological, structural, compositional and photovoltaic properties of the Cu 2 ZnSn(S,Se) 4 thin films were investigated. We found that the formation of voids, cracks and fine-grain layers were suppressed effectively with slight H 3 BO 3 . Based on the decrease of these micro defects, the series resistance decreased and shunt resistance increased largely. And the band gap of CZTSSe solar cells broaden from 1.031 eV to 1.064 eV. The best solar cell showed an open-circuit voltage of 440.1 mV, short-circuit current density of 28.15 mA/cm 2 , fill factor of 58.81% and power conversion efficiency of 7.27% under air mass 1.5 (100 mW/cm 2 ) illumination.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
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2020
·
IF 16.602
Yuhao Liu,Bo Yang,Muyi Zhang,Bing Xia,Chao Chen,Xueping Liu,Jie Zhong,Zewen Xiao,Jiang Tang
The absorber layer is a key component of thin-film solar cells. Based-on the recently-proposed electronic dimensionality concept, a promising solar cell absorber material should be electronically high-dimensional, as is the case for all the mainstream absorbers, such as Si, GaAs, Cu(In,Ga)Se 2 , CdTe, and CH 3 NH 3 PbI 3 . In this work, we propose an electronically three-dimensional semiconductor, bournonite CuPbSbS 3 , as a prospective efficient solar cell absorber material. Our density functional theory calculations indicate that CuPbSbS 3 exhibits desired optoelectronic properties, such as a nearly direct bandgap, high optical absorption coefficients, appropriate p -type doping, and defect tolerance . Experimentally, we developed a butyldithiocarbamate acid (BDCA) solution process for depositing high-quality CuPbSbS 3 thin films and built the first CuPbSbS 3 thin film solar cells. Our CuPbSbS 3 -based solar cells achieved a preliminary power conversion efficiency of 2.23% (open circuit voltage of 699 mV), highlighting the potential of this semiconductor for thin film photovoltaics .
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 35
·13476-13481
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IF 8.262
Dandan Zhao,Qingmiao Fan,Qingwen Tian,Zhengji Zhou,Yuena Meng,Dongxing Kou,Wenhui Zhou,Sixin Wu
A non-hydrazine solution process has been considered as a promising way for the deposition of Cu(In,Ga)(S,Se)2(CIGSSe) thin films. However, from our previous work, the presence of a fine-grained layer in the absorber layer was shown to be an obstacle to further improve the solar cell efficiency. Here, an improved fabrication route is proposed to solve this problem. A mixture of Cu2S, In2Se3, Ga and Se was simultaneously dissolved in 1,2-ethanedithiol and 1,2-ethylenediamine, forming a homogeneous precursor solution to deposit CIGSSe nanocrystal films. By optimizing the selenization method by using rapid thermal processing (RTP) combined with an improved graphite box, large grains throughout the whole absorber layer were successfully obtained. Based on such a high-quality CIGSSe absorber layer, an encouraging power conversion efficiency of 11.8% has been achieved with a Jsc of 28.25 mA cm−2, a Voc of 596 mV and a FF of 69.79% and without an antireflection coating.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 32
·2301125
·
IF 29.4
Lishuai Huang,Hongsen Cui,Wenjun Zhang,Dexin Pu,Guojun Zeng,Yongjie Liu,Shun Zhou,Chen Wang,Jin Zhou,Cheng Wang,Hongling Guan,Weicheng Shen,Guang Li,Ti Wang,Wenwen Zheng,Guojia Fang,Weijun Ke
Narrow-bandgap (NBG) mixed tin/lead-based (Sn-Pb) perovskite solar cells (PSCs) have attracted extensive attention for use in tandem solar cells. However, they are still plagued by serious carrier recombination due to inferior film properties resulting from the alloying of Sn with Pb elements, which leads to p-type self-doping behaviors. This work reports an effective tin oxide (SnO x ) doping strategy to produce high-quality Sn-Pb perovskite films for utilization in efficient single-junction and tandem PSCs. SnO x can be naturally oxidized from tin diiodide raw powders and successfully incorporated into Sn-Pb perovskite films. Consequently, Sn-Pb perovskite films doped with SnO x exhibit dramatically improved morphology, crystallization, absorption, and more interestingly, upward-shifted Fermi levels. The resulting narrow-bandgap Sn-Pb PSCs with natural SnO x doping have considerably reduced carrier recombination, therefore delivering a maximum power conversion efficiency (PCE) of 22.16% for single-junction cells and a remarkable PCE of 26.01% (with a steady-state efficiency of 25.33%) for two-terminal all-perovskite tandem cells. This work introduces a facile doping strategy for the manufacture of efficient single-junction narrow-bandgap PSCs and their tandem solar cells.
研究领域:
材料科学
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光伏技术
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能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yuqian Huang,Rongfeng Tang,Peng Xiao,Bo Che,Yan Wang,Huihui Gao,Gang Wang,Changfei Zhu,Tao Chen
Sulfuration plays a decisive role in enhancing crystal growth and passivate defects in the fabrication of high-efficiency metal-sulfide solar cells. However, the traditional sulfuration process always suffers from high-price professional equipment, tedious processes, low activity of S, or high toxicity of H2S. Here, we develop a desired in situ sulfuration by introducing tartaric acid additive into the hydrothermal deposition process of Sb2S3. Tartaric acid, sodium thiosulfate, and potassium antimony tartaric can form Sb2Sx-contained (x > 3) as-prepared films. Encouragingly, the annealing becomes an inspiring in situ sulfuration process, which can obtain a more compact absorber layer. In addition, the crystallinity and defect property of the Sb2S3 film are also improved significantly. Finally, we achieve a high-performance Sb2S3 solar cell with a power conversion efficiency of 6.31%, which shows an encouraging enhancement of ∼15% compared with the traditional hydrothermal process. This study provides an innovative way to prepare high-efficiency Sb2S3 solar cells and provides a desirable guide to realize the in situ sulfuration process.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2023
·
IF 6.9
Haoyu Xu,Yuzhou Sun,Zhou Shen,Qing Zhou,Qingyun Zhu,Haifeng Gao,Chao Gao,Xiaoyun Teng,Yu Wei
In this paper, we prepared Na–K co-doped Cu 2 ZnSn(S,Se) 4 (CZTSSe) films by solution method. By optimizing the distribution of the K-doping (uniform or localized K-doping) in the precursor films, the efficiencies of CZTSSe solar cells were improved. The effect of the K-doping distribution on the properties of CZTSSe films and solar cells were investigated. Compared to the solar cells without K-doping, the uniform K-doping in the precursor film increased the solar cell efficiency from 10.4% to 11.7%. In comparison, the localized K-doping in the bottom and in the top of the precursor films yielded solar cells with efficiencies of 12.4% and 10.1%, respectively. It was determined that the K-doping distribution primarily had an influence on carrier recombination in the depletion regions of CZTSSe solar cells. Whereas k-doping at the top of the precursor film greatly enhances the carrier recombination in the depletion region, the bottom doping has the opposite effect. The reason could be that the variation of the K-doping distribution modified the crystallization of the CZTSSe films. As the result, the defect properties of the CZTSSe films were altered. Moreover, the effect of the bottom K-doping on the back contact properties of CZTSSe solar cells was investigated by impedance spectroscopy . Though the K-doping can reduce the back contact barrier of the solar cell, the back contact barrier still achieved the height of 228 meV. The results indicated that the back contact barrier would be an important limiting factor for the efficiency of CZTSSe solar cell.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Ang Liang,Yue Jian,Yun Zhao,Shuo Chen,Jun Zhao,Zhuanghao Zheng,Jingting Luo,Hongli Ma,Xianghua Zhang,Zhenghua Su,Guangxing Liang
Enhancing the efficiency of Cu 2 ZnSn (S, Se) 4 (CZTSSe) thin-film solar cells requires the development of well-crystallized light-absorbing layers. A deep understanding of the role of precursor solution chemistry in film nucleation and crystal growth processes is essential. Insights into these processes enable the development of innovative strategies to enhance absorber quality, minimize detrimental bulk defects, and ultimately improve device performance. This study elucidates the condensation reactions between thiourea and metal cations, as well as the alcoholysis of 2-methoxyethanol (MOE), at different concentrations of precursor solutions. The primary focus of this study is implementing a simple and environmentally friendly innovative spin-coating strategy, aimed at optimizing Cu 2 ZnSnS 4 (CZTS) precursor films and adjusting the Se content within the film bulk to promote grain growth during selenization. This strategy effectively improves absorber morphology while suppressing the formation of deep-level defects, thereby enhancing carrier transport in both interfacial and bulk regions of the absorber layer. Consequently, CZTSSe absorbers with enhanced crystallinity and reduced defects are synthesized, resulting in a solar cell with an impressive efficiency of 14.10%. These findings underscore the potential for creating highly efficient kesterite CZTSSe solar cells through the manipulation of precursor solution chemistry using environmentally friendly solvents.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 37
·19357-19366
·
IF 11.301
Jie Cao,Junke Jiang,Nan Li,Yifan Dong,Yongheng Jia,Shuxia Tao,Ni Zhao
Two-step sequential deposition has been shown to be an effective method to improve the quality of perovskite films and performance of perovskite solar cells (PSCs). In this work, we have developed a two-step sequential deposition method, incorporating an alkali cation (e.g., Cs+) and a benzylammonium (BA+) cation into formamidinium (FA+)-based perovskite thin films for highly efficient and stable PSCs. By combining experimental characterization and theoretical calculations, we demonstrate that not only the co-incorporation of alkali cations and BA+ significantly improves the crystallinity and orientational growth of perovskite films, but also Cs+ enhances the passivation effect of BA+ ions on the perovskite surface via strengthening bonding between BA+ and perovskites. In particular, inclusion of Cs+ in BA+-passivated perovskites promotes the preferred orientation of defect-free (1 0 0) facets. As a result, we observed remarkable improvements in both open-circuit voltage and fill factor of formamidinium-benzylammonium-cesium (FABACs)-based PSCs, achieving a champion efficiency of 22.5%. More importantly, the FABAC perovskite films demonstrated superior resistance to humidity and photo-thermal stress, and the perovskite-based devices (without encapsulation) retained over 95% of the initial efficiency after exposure to air for 2 months. Manipulating the perovskite composition by combining small alkali and large organic cations in two-step sequential deposition provides an efficient and facile approach to realize highly efficient and stable perovskite devices.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2019
·
IF 4.674
Wenhui Zhao,Xiaoyan Gan,Lili Ke,Liling Guo,Hanxing Liu
Two-dimensional layered organic-inorganic perovskite hybrids have attracted increasing attention due to their outstanding moisture resistance and promising optoelectronic properties. However, the photovoltaic performance in solar cells is still a huge challenge for two-dimensional perovskite films. With the aim to improve the efficiency of 2D perovskite solar cells, the new (ClC 6 H 4 C 2 H 4 NH 3 ) 2 MA n−1 Pb n I 3n+1 perovskite family (abbreviated as (CPEA) 2 MA n−1 Pb n I 3n+1 ) are synthesized by a simple one-step hot-casting method in this study. It is found that the variation of n value (n = 3–6) has great influence on the microstructure, grain size, charge mobility, trap density and photovoltaic performance of the 2D (CPEA) 2 (MA) n−1 Pb n I 3n+1 . Due to the best film quality and prolonged carrier lifetime, the (CPEA) 2 MA 4 Pb 5 I 16 (n = 5) perovskite solar cell exhibits a highest efficiency of 11.86%, with a V oc of 0.989 V, a J sc of 19.92 mA/cm 2 and FF of 60%, respectively. It is anticipated that our approach to explore new organic spacer cations in 2D perovskites may pave the way for their application with high performance.
研究领域:
材料科学
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光伏技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wenjing Qi,Jiale Li,Yameng Li,Khumal Sohail,Hao Ling,Peng Wang,Sumin Jiao,Fan Liu,Xin Zhou,Huanhuan Wang,Dekun Zhang,Yi Ding,Xinliang Chen,Guofu Hou,Jingshan Luo,Ying Zhao,Yuelong Li,Xiaodan Zhang
Organic–inorganic metal halide perovskite materials have been widely studied as the light absorber for efficient photovoltaics. However, perovskite layers with defective nature are typically prepared with an uncontrollable crystallization process, intrinsically limiting further advance in device performance, and thus require delicate manipulation of crystallization processes and defect density. Here, we demonstrate an ammonium-assisted crystallization of perovskite absorbers during a two-step deposition to fabricate efficient solar cells. Addition of ammonium iodide (NH4I) is devised to manipulate the nucleation and crystal growth of perovskite, wherein the formation and transition of intermediate x[NH4+]•[PbI3]x− enables high-quality perovskite layers with an enlarged grain and reduced defect density. As a result, the perovskite solar cells (PSCs) achieve an average efficiency of 21.36% with a champion efficiency of 22.15% and improved environmental stability over 30 days in ambient conditions with varied relative humidity. These results with addition of NH4I provide an available and ingenious way to construct high-quality perovskite layers for efficient solar cells and will advance the commercial application of perovskite-based photovoltaics.
研究领域:
材料科学
·
能源技术
·
光电转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Advances
·
2023
·Vol. 9
·期 21
·
IF 13.6
Cheng Liu,Xiuhong Sun,Yi Yang,Olga A. Syzgantseva,Maria A. Syzgantseva,Bin Ding,Naoyuki Shibayama,Hiroyuki Kanda,Farzaneh Fadaei Tirani,Rosario Scopelliti,Shunlin Zhang,Keith G. Brooks,Songyuan Dai,Guanglei Cui,Michael D. Irwin,Zhipeng Shao,Yong Ding,Zhaofu Fei,Paul J. Dyson,Mohammad Khaja Nazeeruddin
All-inorganic CsPbI3 perovskite solar cells (PSCs) with efficiencies exceeding 20% are ideal candidates for application in large-scale tandem solar cells. However, there are still two major obstacles hindering their scale-up: (i) the inhomogeneous solid-state synthesis process and (ii) the inferior stability of the photoactive CsPbI3 black phase. Here, we have used a thermally stable ionic liquid, bis(triphenylphosphine)iminium bis(trifluoromethylsulfonyl)imide ([PPN][TFSI]), to retard the high-temperature solid-state reaction between Cs4PbI6 and DMAPbI3 [dimethylammonium (DMA)], which enables the preparation of high-quality and large-area CsPbI3 films in the air. Because of the strong Pb-O contacts, [PPN][TFSI] increases the formation energy of superficial vacancies and prevents the undesired phase degradation of CsPbI3. The resulting PSCs attained a power conversion efficiency (PCE) of 20.64% (certified 19.69%) with long-term operational stability over 1000 hours. A record efficiency of 16.89% for an all-inorganic perovskite solar module was achieved, with an active area of 28.17 cm2.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
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