Journal of Physical Chemistry C
·
2018
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IF 4.484
Jing Ma,Jingjing Chang,Zhenhua Lin,Xing Guo,Long Zhou,Ziye Liu,He Xi,Dazheng Chen,Chunfu Zhang,Yue Hao
With the fast development of the perovskite solar cell, its energy conversion efficiency has improved rapidly. In this paper, a CH3NH3PbI3–xClx organic–inorganic perovskite solar cell (PSC) was successfully prepared by the one-step solvent engineering method, and the planar heterojunction perovskite solar cell was optimized by interface engineering of the cathode interlayers. It was found that TiCl4 treatment could effectively reduce the TiO2 surface roughness, decrease the surface defects, improve the perovskite thin film crystallinity, and reduce the charge carrier recombination; hence, the short-circuit current density of PSCs and charge extraction and collection efficiencies were enhanced. Furthermore, PC60BM fullerene treatment could optimize the contact condition and reduce the interfacial potential loss. The device hysteresis effects after PCBM treatment were also reduced. The combination of TiCl4 and PC60BM treatments could largely improve the PSC device performance with a power conversion efficiency of 16.4% due to the synergetic effect.
研究领域:
材料科学
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能源科学
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2023
·Vol. 109
·期 1
·182-191
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IF 2.5
Sun Shuo,Zhang Siyu,Han Yuanyuan,Tan Haidong,Wen Jian,Liu Xingyun,Sun Yuxia,Liu Hongri
Abstract The strong Ti-O bonds in TiO 2 and poor compatibility with Sb 2 Se 3 result in poor performance when used as electron transport layers (ETL) for Sb 2 Se 3 solar cells. Therefore, cadmium sulfide is usually used as a buffer layer to improve its compatibility. In the present work, we deposited a layer of CdS by spin coating method on TiO 2 ETL and fabricated TiO 2 /CdS dual ETL. The CdS layer improved the electronic properties of TiO 2 and grain orientation of Sb 2 Se 3 thin films. As a result, the average short circuit current and fill factor of Sb 2 Se 3 solar cells were improved, and the final champion power conversion efficiency was enhanced from 2.6% to 4.71%. This study supplied a route for the application of titanium dioxide as a broad band gap electron transfer material for Sb 2 Se 3 solar cells. Graphical Abstract In this work, we deposited a 120 nm CdS layer on TiO 2 ETL. The CdS layer improved the electronic properties of TiO 2 and optimized the grain orientation of Sb 2 Se 3 thin films. The Jsc and Voc of Sb 2 Se 3 solar cells were also improved, and the ultimate champion power conversion efficiency was enhanced from 2.60 to 4.71%. Our work provides an effective method to improve the photovoltaic performance of Sb 2 Se 3 solar cells.
研究领域:
材料科学
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光伏技术
✓ 已验证
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 15
·3820
·
IF 3.1
Zhanpeng Xu,Zhineng Lan,Fuxin Chen,Chong Yin,Longze Wang,Zhehan Li,Luyao Yan,Jun Ji
Planar perovskite solar cells (PSCs), as a promising photovoltaic technology, have been extensively studied, with strong expectations for commercialization. Improving the power conversion efficiency (PCE) of PSCs is necessary to accelerate their practical application, in which the electron transport layer (ETL) plays a key part. Herein, a single-anchored ligand of phenylphosphonic acid (PPA) is utilized to regulate the chemical bath deposition of a TiO2ETL, further improving the PCE of planar PSCs. The PPA possesses a steric benzene ring and a phosphoric acid group, which can inhibit the particle aggregation of the TiO2film through steric hindrance, leading to optimized interface (ETL/perovskite) contact. In addition, the incorporated PPA can induce the upshift of the Fermi-level of the TiO2film, which is beneficial for interfacial electron transport. As a consequence, the PSCs with PPA-TiO2achieve a PCE of 24.83%, which is higher than that (24.21%) of PSCs with TiO2. In addition, the unencapsulated PSCs with PPA-TiO2also exhibit enhanced stability when stored in ambient conditions.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Aobo Wan,Longkai Zhu,Yizhen Zhang,Shijing Huang,Yun He,Shunxi Zhang,Fengjiao Quan,Jianfen Li
The poor contact between the photocatalyst and the FTO substrate are the main factors lead to the low performance of photocatalytic fuel cell (PFC). Herein, a FTO pre-treated with a TiO 2 electron transport layer was used as a substrate for the synthesis of the MoS 2 /BiVO 4 /pre-FTO photoanode. The proposed MBV-4/pre-FTO photoanode with its enhances the visible light absorption and effectively delays the recombination of the photoexcited charge. The MBV-4/pre-FTO composite photoanode (6.02 mA/cm 2 ) exhibited a photocurrent density that was 2.2 times higher than that of the BiVO 4 photoanode (2.78 mA/cm 2 ). This is attributed to the short charge migration length of the thin MoS 2 layer, the fast photoexcited electron transport effect of the TiO 2 seed layer, and the heterojunction structure of the proposed photoanode. The DFT calculation result indicated that the TiO 2 electron transport layer showed an outstanding photoelectron attractive and transporting effect. The MoS 2 /Ni foam was employed as the photocathode to establish a mismatched Fermi level for driving PFC. The short-circuit current, open-circuit voltage, and maximum power density of the PFC were 0.578 mA/cm 2 , 0.632 V, and 0.125 mW/cm 2 , respectively. The main photodegradation active species are the superoxide anion (∙O 2– ) and the photoexcited hole (h + ), and the degradation efficiency is 61.97 %.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Zongbao Zhang,Lai Xie,Ruikun Lin,Qiqi Qin,Yangyang Cai,Yang Zhou,Hui Liu,Xubing Lu,Xingsen Gao,Lingling Shui,Sujuan Wu,Jun-Ming Liu
Planar perovskite solar cells based on Li 2 SiO 3 modified TiO 2 electron transport layer are fabricated by one-step method. Here the Li 2 SiO 3 modified TiO 2 films are prepared by a simple soaking process at 65 °C. The effect of Li 2 SiO 3 modification on the photoelectric properties of TiO 2 films and devices has been systematically investigated. Compared to the reference TiO 2 , the modified TiO 2 demonstrates better characteristics such as better surface wetting properties of perovskite precursor, enhanced electron mobility and reduced electron trap state density, which contribute to the favorable photovoltaic performance . At the optimized process , the device based on the modified TiO 2 film yields a champion power conversion efficiency of 18.67%, being much higher than 14.78% of the reference device. The improved performance is primarily attributed to the promoted charge transport and reduced charge recombination in the modified electron transport layer. This work provides a simple route to obtain efficient planar perovskite solar cells by low-temperature process, which will be compatible with flexible plastic substrates in future practical applications.
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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2020
·
IF 6.984
Yaxin Deng,Shuxian Li,Xin Li,Rui Wang
Effective electron transport layers (ETLs) provide enhanced charge separation and transport, therefore as a vital part in improving the efficiency of planar perovskite solar cells (PSCs). Herein, we report a new synergistic strategy using HI to passivate TiO 2 film and surface while incorporating tin element into TiO 2 ETL. HI is first used to control the hydrolysis of TiO 2 precursors and eliminate oxygen vacancies related trap states. Then, tin element is incorporated into HI-passivated TiO 2 precursor solution to construct composite TiO 2 /SnO 2 film, affording increased electron mobility and suitable energy level. Moreover, the entire preparation process is performed under uncontrolled environmental conditions at 150 °C temperatures. Benefiting from the improved quality of the ETLs, the unencapsulated PSCs achieve optimized power conversion efficiency (PCE) of 17.77% with greatly improved stability. After storage in ambient for 1450 h, the device still maintains 92% of its initial efficiency, while hold 79% PCE after 7 h of 1 sun exposure and 86% PCE after heating at 100 °C for 21 h.
研究领域:
材料科学
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太阳能
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Fengyan Xie,Chunlei Huang,Guofa Dong,Minghui Wu,Dongli Meng,Hongping Yang,Bingwen Zhang,Yafeng Li,Mingdeng Wei
The TiO 2 -based electron transport layer (ETL) holds significant potential for efficient perovskite solar cells (PSCs), yet challenges in interfacial defects and energy alignment limit performance. Herein, sulfur-doped graphitic carbon nitride (SCN) is incorporated into TiO 2 using a rapid glass-assisted annealing method to engineer the ETL. The SCN/TiO 2 composite enhances perovskite crystallization by suppressing PbI 2 secondary phases and improves interfacial compatibility. Additionally, optimized energy-level alignment facilitates electron extraction while reducing non-radiative recombination, as evidenced by photoluminescence and time-resolved spectroscopy. These synergistic effects yield a champion device with a power conversion efficiency (PCE) of 21.02%, surpassing the pristine TiO 2 -based counterpart (18.20%) by 16.6%, alongside elevated open-circuit voltage (V oc = 1.10 V) and short-circuit current density (J sc = 24.98 mA cm -2 ). This work demonstrates the efficacy of S-CN in addressing interfacial limitations, offering a scalable strategy to advance high-efficiency perovskite photovoltaics.
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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表面与界面工程
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半导体器件物理
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
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
·
太阳能
·
光伏技术
·
有机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）