Advanced Materials Interfaces
·
2020
·Vol. 7
·期 19
·2000754
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IF 4.948
Wenzhong Fang,Pan Wang,Zitao Ni,Tao Sun,Chaoyu Xiang,Kun Yue,Rongfei Wang,Jie Yang,Yao Zhou,Chong Wang,Yu Yang
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole injection layer plays an important role in planar Si/PEDOT:PSS heterojunction solar cells (HSCs). Herein, a MoO x mixed aqueous PEDOT:PSS cosolvent is developed and is applied into a Si/PEDOT:PSS solar cell preparation via a time-saving one-step spin-coating method. With an optimal concentration of MoO x dopants, the power conversion efficiency of the device exhibits from 10.26% up to 13.82% with all inherent photovoltaic parameters enhanced. The detailed characterization and analytical results indicate that an advanced electronic property is produced by MoO x dopants and interface optimization caused by synergistic effects from Mo 5+ and Mo 6+ species with PEDOT:PSS, which enhances its interface work function and promotes hole transportation capacity. The result paves a path for exploring efficient Si/PEDOT:PSS HSCs with suitable functional material and a simple solution-processable method.
研究领域:
材料科学
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光伏技术
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有机电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Xiaoyan Gan,Kegui Li,Longtao Du,Ruoqi Wang,Yuge Chang,Liling Guo,Hanxing Liu
This study explores the optimization of (TMA)2MA4Pb5I16 perovskite films by regulating the film quality through the addition of MACl and MAAc additives. We found that adding MACl resulted in a film of larger grains with a power conversion efficiency (PCE) of 5.34%, while excessive MACl led to the formation of low-dimensional phases. Adding 7.5% MAAc improved the film quality with a PCE of 5.64%, although excessive MAAc induces pores and smaller grains. To address these issues, we proposed the combined use of MACl and MAAc additives, resulting in films with a larger grain size, smoother surface, and denser structure. Remarkably, the addition of MAAc + MACl achieved a champion PCE of 8.86% with good reproducibility. Mechanism studies revealed that TMA and MAAc formed a stable complex with PbI2 in solution, disrupting nucleation laws and promoting the formation of nuclei, leading to denser films with smaller grains. Additionally, the MACl treatment effectively promoted grain growth, resulting in high-quality films. This study presents novel insights into dual additive usage and their role in film crystallization, offering valuable guidance for the preparation of high-performance perovskite films.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 28
·10604-10612
·
IF 5.7
Zhongyu Liu,Hongwei Wang,Haijun Han,Hong Jiang,Ning Liu,Jianwei Wang,Jing Zhang,Tian Cui,Xiaohui Liu
An inorganic perovskite CsPbI3 with a suitable bandgap and excellent optoelectronic properties has attracted tremendous attention as a promising absorber in perovskite solar cells (PSCs). A surface modification strategy of introducing organic molecules with functional groups to treat perovskite films has been proven to be an effective route to achieve high-performance PSC devices. However, the effect of the molecular size of modifiers is almost ignored in surface passivation studies. In this work, three alkylamine modifiers with different molecular sizes were incorporated to post-treat CsPbI3 films to systematically investigate the influence of alkyl chain length on device performance. It was found that the alkylamine treatments can remarkably ameliorate film morphology and interface contact, passivate defects, and increase hydrophobicity, resulting in greatly improved device efficiency and stability. In particular, the CsPbI3 film treated with 1,5-pentanediamine (PDA) with a suitable chain length acquires optimum results owing to its most efficient passivation effect and suppressed nonradiative recombination. Consequently, the inverted PDA-based CsPbI3 PSC exhibits a champion power conversion efficiency (PCE) of 19.52%, outperforming the control device with a PCE of 13.43% and other alkylamine-treated devices. Furthermore, both the unencapsulated PDA-treated CsPbI3 films and PSC devices present considerably enhanced long-term stability. This work highlights the great significance of tailoring the molecular size of interfacial modifiers towards achieving efficient and stable inorganic PSCs.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Jiabin Qi,Hao Xiong,Gang Wang,Huaqing Xie,Wei Jia,Qinghong Zhang,Yaogang Li,Hongzhi Wang
Crystallization and interface engineering of perovskite are the most important factors in achieving high-performance perovskite solar cells (PSCs). Herein, we construct an ultrathin CdSe quantum dots (QDs) underlayer via a solution-processable method, which acts as a seed-mediated layer for perfect perovskite film, with both uniform morphology and better absorption capacity . In addition, CdSe QDs and perovskites form a fully crystalline heterojunction , which is beneficial to minimizing the defect and trap densities . Then, an Ostwald ripening process is adopted to fabricate large-grain, pinhole-free perovskite thin film , by a simple methylammonium bromide treatment. Besides, the first principle is applied in calculating organic/inorganic hybrid perovskite, confirming that electrons can move even quicker and more effectively, as a result of our work. Due to these treatments, representing a very simple method to simultaneously control perovskite crystallization and optimize the interfaces in PSCs, a maximum power conversion efficiency of 15.68% is achieved, 35% higher than the PSC both without CdSe and MABr treatment (11.57%), indicating better performance.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2016
·
IF 1.86
Zhenrong Jia,Ying Wei,Xiaofeng Wang,Siwei Hu,Kai Yao,Fan Li
Herein, the liquid crystal molecule, 3,6-bis(5-(4-hexyl-phenyl)-2-thienyl)-2,5-bis(2-ethylhexyl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (DPP-TP6), is introduced into P3HT/ZnO to control the morphology of the hybrid system. Induced by the self-assembly behavior of DPP-TP6 upon thermal treatment at the mesomorphase temperature, the dispersion of ZnO nanocrystals is effectively improved and the crystallinity and ordering of the P3HT is also enhanced, which provides more interfacial area for exciton dissociation and efficient path for carrier transport. On such basis, the power conversion efficiency of P3HT/ZnO hybrid solar cells is improved mainly due to the increase of J sc .
研究领域:
材料科学
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光伏技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2015
·
IF 6.217
Xichang Bao,Yujin Wang,Qianqian Zhu,Ning Wang,Dangqiang Zhu,Junyi Wang,Ailing Yang,Renqiang Yang
The quality and stability of perovskite films are critical for solar cells using this technology. Here, we fabricate a high-quality CH 3 NH 3 PbI 3 perovskite film by introducing small amounts of N -methyl-2-pyrrolidone into a mixture of γ-butyrolactone and dimethylsulphoxide. The perovskite film consists of compact grains (average sizes of ∼57 nm) with unclear boundaries which show a mirror-like surface with the root mean square roughness of only 2.39 nm. The power conversion efficiency of 11.77% is obtained with the fill factor as high as 80.52% under one sun illumination (100 mW cm −2 ). Furthermore, the stability of the perovskite solar cells is greatly improved by forming compact perovskite films with excellent surfaces. The results indicate that high-quality perovskite films with compact grains are a promising choice for high-stable, efficient perovskite solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Science Bulletin
·
2023
·
IF 18.9
Chen Li,Haoxuan Sun,Min Wang,Shan Gan,Da Dou,Liang Li
Perovskite solar cells offer great potential as a sustainable power source for distributed electronic devices that operate indoors. However, the impact of advanced lighting technology , especially the widely used pulse width modulation (PWM) technology, on perovskite photovoltaics has been ignored. Herein, for the first time in photovoltaics, we find that the light impact emitted by the PWM lighting system caused dynamic strain in perovskite thin films , induced phase separation, and accelerated the generation of metallic lead (Pb 0 ) defects, leading to irreversible degradation of the cell performance after 27 h ( T 80 ). To address this issue, formamidinium triiodide (FAI 3 ) is chosen to treat the surface of the perovskite and release residual stress, resulting in reduced lattice deformation during dynamic strain processes. Meanwhile, it suppresses harmful Pb 0 defects and reduces V oc loss at low light intensity . The champion device achieves impressive power conversion efficiency (PCE) of 35.14% and retains 99.5% of the initial PCE after continuous strobe light soaking for 2160 h.
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
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Shuyi Liu,Sijia La,Xuzheng Feng,Xiaoxu Sun,Xianggang Chen,Zishuo Wang,Jixiang Tang,Longfei Yan,Shuyuan Fan,Molang Cai
The phase segregation of wide-band gap perovskite solar cells (PSCs) typically originates from defect centers and strain induced by nonstoichiometric compounds. In this study, we have discovered an excess of PbI2 at the buried interface in inverted wide-band gap PSCs. To address this issue, RbI is introduced to interact with the excessive PbI2, thereby in situ forming a layer of inorganic perovskite RbPbI3. The presence of RbPbI3 as prenucleation centers facilitates intimate contact and enhances crystallinity of the wide-band gap perovskite, thereby alleviating lattice strain and reducing nonradiative recombination centers. Consequently, ion migration is suppressed, and phase segregation at the buried interface is inhibited. After the addition of RbI, the power conversion efficiency (PCE) of the wide-band gap semitransparent device is increased from 17.96 to 19.5%, and the bifacial factor is 83.4%. Furthermore, after continuous illumination at an intensity equivalent to AM 1.5 G for 1000 h, the device based on RbI retains approximately 81.71% of its initial PCE.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xiaohui Ma,Liqun Yang,Xueni Shang,Mengjia Li,Deyu Gao,Cuncun Wu,Shijian Zheng,Boxue Zhang,Jiangzhao Chen,Cong Chen,Hongwei Song
The trap-assisted nonradiative recombination at grain surface and grain boundary (GB) of perovskite films impede the further improvement of power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs). In addition, the poor moisture stability of perovskite films hinders the commercial application of PSCs. Herein, we report a multifunctional GB modification strategy where the wide-bandgap hydrophobic PbSO 4 modification layer is in situ formed at the GBs of perovskite films through the reaction between methylamine sulfate and PbI 2 . It is revealed that multiple functions are achieved after the formation of PbSO 4 modification layer, including crystallization improvement, defect passivation, and hydrophobicity improvement. As a result, the PbSO 4 modified device exhibits a PCE enhancement from 19.53% to 21.90% as compared to the control device. Moreover, up to 71% of its initial PCE is maintained for the unencapsulated PbSO 4 modified device after aging under a relative humidity of 80 ± 5% for 250 h. This work proposes an effective multifunctional approach to modify the GBs of perovskite films for the purpose of simultaneous increasement of PCE and stability.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Chunying Ma,Chu Zhang,Shennan Chen,Yongchun Ye,Lei Sun,Liguo Gao,Yusran Sulaiman,Tingli Ma,Miaogen Chen
Perovskite solar cells (PSCs) have attracted a lot of attention from researchers as the most promising photovoltaic devices due to their outstanding power conversion efficiency (PCE) and low-cost. Although the PSC have reached a PCE over 25%, the interface between the perovskite and hole transport layer (HTL) still is a crucial factor limiting higher PCE and long-term stability. In this work, we choose an organic molecule Bis(trifluoromethyl)benzo amide (BTFZA) to passivate defects at the perovskite/HTL interface. Owing to a strong interaction with uncoordinated Pb 2+ , the BTFZA effectively passivated the surface defects , remarkably promoted carrier transportation. As a result, the perovskite device based on BTFZA surface modification showed a PCE increase of 16.4% over the control device. Especially, the fill factor (FF) and the open-circuit voltage (V OC ) of the modified device increased significantly. In addition, the unencapsulated BTFZA-modified device maintains better PCE compared to the control device after aging for over 600 h in ambient air with extreme humidity and temperature conditions. Results suggested that the introduction of BTFZA is an effective way to regulate the surface of perovskite film aiming at highly efficient and stable perovskite solar cells.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Joule
·
2018
·
IF 0
Fei Wang,Xianyuan Jiang,Hao Chen,Yuequn Shang,Hefei Liu,Jingle Wei,Wenjia Zhou,Hailong He,Weimin Liu,Zhijun Ning
Summary The power conversion efficiency (PCE) of tin perovskite solar cells is impeded by the extremely poor resistance to oxidation and high density of intrinsic Sn vacancies. Herein, we grow a 2D-quasi-2D-3D Sn perovskite film using removable pseudohalogen NH 4 SCN as a structure regulator. This hierarchy structure remarkably enhances air stability resulting from the parallel growth of 2D PEA 2 SnI 4 as the surface layer. We then explore the hierarchy structure perovskite films in planar structural solar cells, which generate a PCE up to 9.41%. The device retains 90% of its initial performance for almost 600 hr. Our results suggest that adding removable NH 4 SCN in a perovskite precursor can significantly improve the stability and photovoltaic performance of Sn perovskite. This finding provides a powerful strategy to manipulate the structure of low-dimensional perovskite in order to enhance the performance of perovskite solar cells.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
JOURNAL OF POWER SOURCES
·
2015
·
IF 6.217
Guoshuai Wang,Huiyun Wei,Yanhong Luo,Huijue Wu,Dongmei Li,Xinhua Zhong,Qingbo Meng
CdSe x Te 1−x alloyed colloidal quantum dots show great potential application on quantum dot-sensitized solar cells (QDSCs) due to its relatively wide light absorption range and high chemical stability. In this respect, a thin Mn modified CdSe layer is introduced into TiO 2 /CdSe x Te 1−x alloyed QDs surface via a simple chemical bath deposition method (CBD) in order to further improve the cell performance. The power conversion efficiency of CdSe x Te 1−x QDSCs has been improved to 8.14%. Detailed investigation on the influence of this modification toward the TiO 2 /CdSe x Te 1−x interface on the cell performance reveals that introduction of Mn into CdSe QDs is found to facilitate the Mn-doped CdSe deposition and improve the light absorption of the device. In the meantime, the existence of the (Mn-)CdSe layer can also work as a passivation layer to reduce charge recombination.
研究领域:
材料科学
·
能源研究
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）