JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Xingyue Liu,Zhiyong Liu,Xianhua Tan,Haibo Ye,Bo Sun,Shuang Xi,Tielin Shi,Zirong Tang,Guanglan Liao
All-inorganic CsPbBr 3 is attracting tremendous attentions in photovoltaic field due to its superior stability. However, CsPbBr 3 perovskite always suffers from a poor crystallinity and film morphology. Many efforts have been paid on the CsBr deposition process to improve the film quality, while few attentions are paid on the crystallization kinetics of the PbBr 2 framework film. Here, we demonstrate a novel antisolvent-washing strategy for the PbBr 2 film for the first time to fabricate high-quality CsPbBr 3 film. This technique has a significant impact on the nucleation and growth of PbBr 2 crystals. As-prepared CsPbBr 3 films exhibit more homogeneous with higher crystallinity and coverage as well as larger grain sizes compared to those untreated ones. The best-performing antisolvent-treated perovskite solar cell achieves a scanned power conversion efficiency of 8.55%, which is an excellent efficiency for planar CsPbBr 3 cells reported yet. This enhancement can be mainly attributed to the more effective charge transport and suppressed non-radiative recombination caused by the reduced defect densities . Moreover, our devices show superb stability when stored in air for 1000 h and upon persistent thermal attack at 80 °C. Our work provides a new train of thought for controlling the growth dynamics and film morphology of CsPbBr 3 films.
研究领域:
材料科学
·
光伏技术
·
太阳能电池
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 131
·期 8
·
IF 1.395
Caina Min,Qun Pu,Liu Yang,Hong Fan
A novel polysiloxane bearing dodecyl and epoxy side groups (DESO) was synthesized as an intermediate through hydrosilylation of polymethylhydrosiloxane with allyl glycidyl ether and 1-dodecene. Then, dodecyl/piperazine functional polysiloxane (DPSO) was prepared through the reaction of N -aminoethylpiperazine with DESO. The chemical structure of DPSO was characterized with FTIR and 1 H-NMR spectroscopy and its application performance on cotton fabrics was studied. DPSO with dodecyl side groups gifted the treated fabrics with good wettability and whiteness compared with piperazine functional polysiloxane, while with a slightly reduced softness as well as thickening handle. Film morphology, orientation, and performance on cotton substrates of DPSO were investigated by scanning electron microscope, atomic force microscopy, X-ray photoelectron microscope, and so on. Affected by the dodecyl side groups, DPSO formed relatively hydrophilic, macroscopically smooth but actually uneven films with many dodecyl side chain pillars on the treated substrate surfaces. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40186.
研究领域:
高分子化学
·
纺织化学与染整工程
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材料表面科学
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功能材料
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DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Xinshun Qin,Muhammad Umair Ali,Hongbo Mo,Zhengtian Yuan,Yanling He,Alan Man Ching Ng,Aleksandra B. Djurišić
Perovskite light-emitting diodes (LEDs) with different self-assembled monolayers (SAMs), namely 2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz), [4-(3,6-dimethyl-9H-carbazol- 9-yl)butyl] phosphonic acid (Me-4PACz), and [2-(3,6-Dichloro-9H-carbazol-9-yl)ethyl]phosphonic acid (Cl-2PACz), have been investigated. We find that the underlying SAM affects the perovskite morphology despite the use of poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(4,4′-(N-(4-butylphen-yl)))] (TFB) hole transport layer between the SAM and the perovskite. Despite similar device performance in terms of maximum luminance and external quantum efficiency, the devices exhibit significant differences in lifetime which correlate with perovskite thin film morphology. We show that significant roughness is detrimental to the device stability. The devices with 2PACz SAM, which exhibit the most favorable film morphology, exhibit T 50 lifetime of 1.43 h.
研究领域:
材料科学
·
光电技术
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2025
·
IF 4.2
Junhong Liang,Xudong Li,Furong Shi,Jinye He,Sheng Guan,Yuan Zhou,Pengzhi Guo,Chenglong Wang,Yangjun Xia
Continuous interpenetrating network morphology on the performance of organic solar cells (OSCs) have the effect of ease, how to control the bulk heterojunction (BHJ) the formation of the fiber morphology is of vital importance. In this study, a series of polymers were synthesized by rationally varying the atoms connecting the conjugated backbone and side chains, PBDT-T-SBDD, PBDT-TS-SBDD and PBDT-TDS-SBDD were used to systematically study the effects of sulfur atom on the electron conformation of the molecule, the morphology of the blend film and the properties of the device. We found that the introduction of sulfur atoms can enhance the intermolecular interaction, thus reducing the energy disorder of the blend film. However, excessive introduction of sulfur atoms leads to excessive steric hindrance of side chain of the molecules, resulting in excessive local aggregation. Compared with PBDT-T-SBDD: Y6 and PBDT-TDS-SBDD: Y6-based OSCs, PBDT-TS-SBDD: Y6-based OSCs has both higher photovoltaic performance, reaching a PCE of 11.33 %, due to the well-defined fiber structure which significantly improves the charge transport channel and phase separation of the blend film.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 29
·7669-7676
·
IF 4.696
Ying Sun,Chao Zhang,Qizan Huang,Bin Dai,Baoping Lin,Hong Yang,Xueqin Zhang,Lingxiang Guo,Yurong Liu
In a bulk-heterojunction (BHJ) polymer solar cell, film morphology of the active layer plays a significant role in determining the device performance. For lots of polymers, optimization of BHJ morphology can be achieved by employing high boiling solvent additive such as 1-chloronaphthalene (1-CN). However, the additive process significantly increases the device fabrication complexity and leads to poor reproducibility of the device performance, which is not beneficial to large-scale manufacturing. In this paper, we show that well-organized film morphology can be achieved by systematic modification of the polymer structure. First, a new diketopyrrolopyrrole based monomer with a naphthalene group introduced to the terminal of the alkyl side chain was synthesized. The naphthalene group was incorporated to improve the miscibility of the polymer with a fullerene derivative and help the polymer chains self-assemble into an ordered microstructure for defined film morphology. By simply varying the monomers' ratio in copolymerization, we prepared a series of indacenodithiophene-diketopyrrolopyrrole based polymers namely, P1, P2, P3 and P4, with different contents of naphthalene group functionalized side chains. The influences of naphthalene modification on the optical and electrochemical properties of polymers, film morphology and photovoltaic properties were investigated in detail. As expected, we observed better miscibility without any significant effects on the electronic and optical properties of the polymer for 25% molar percentage of the naphthalene linked monomer employed during polymerization. However, further enhancement of the naphthalene content may decrease π–π stacking, hence leading to reduced optical property and hole mobility. When 50% molar percentage of the naphthalene linked monomer was contained in polymerization, an optimum device efficiency of 4.01% can be achieved, which was much higher than 2.92% for the 1-CN additive optimized non-naphthalene side chain counterpart based device.
研究领域:
材料科学
·
有机电子学
·
光电子器件
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Longtao Du,Jianhua Liao,Kegui Li,Yuge Chang,Qiang Huang,Xiaoyan Gan,Liling Guo,Hanxing Liu
Quasi-two-dimensional (Q-2D) perovskite solar cells have garnered significant attention due to their unique hydrophobic organic cations and commendable stability. However, there is currently no established set of criteria for selecting the appropriate organic cations to fabricate highly efficient and stable Q-2D perovskite solar cells. This work systematically examines the organic interstitial cations containing fluorine atoms at various substitution positions in phenylmethylamine, focusing on crystal orientation, film morphology, and the photoelectric conversion efficiency (PCE) of n = 5 perovskite films. Through density functional theory (DFT) calculations and crystal structure analysis, it is revealed that compared to PMA-F, oFPMA-F and mFPMA-F, pFPMA-F exhibits the largest dipole moment. Additionally, (pFPMA)2PbI4 demonstrates a larger effective mass and greater layer spacing compared to (PMA)2PbI4. The findings revealed that in comparison to PMA-F, oFPMA-F and mFPMA-F, the pFPMA-F 2D perovskite film exhibits a preferential in-plane orientation, superior crystallinity, and higher carrier mobility. Consequently, the Q-2D perovskite solar cell device utilizing pFPMA-F achieved a PCE of 15.88%, which markedly surpassed those of the PMA-F (9.15%), oFPMA-F (12.62%), and mFPMA-F (7.8%) counterparts. Additionally, the device architecture based on pFPMA-F demonstrated exceptional stability.
研究领域:
材料科学
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光伏技术
·
理论计算
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 83
·79952-79957
·
IF 3.289
Yongchao Zhang,Junyi Wang,Jintong Xu,Weiye Chen,Dangqiang Zhu,Wei Zheng,Xichang Bao
Formamidinium lead iodide (FAPbI3) is a more promising broader absorption material than methylammonium lead iodide (MAPbI3) for perovskite solar cells (PSCs). However, in most cases the power conversion efficiencies (PCE) of FAPbI3 based inverted planar PSCs are still lower than those of MAPbI3 ones due to the inferior morphology of FAPbI3 film. In this paper, we demonstrate an optimised formamidinium iodide/isopropyl alcohol (FAI/IPA) modification procedure to improve the photoactive layer for efficient inverted planar FAPbI3 PSCs. The results show that there is an obvious improvement in open circuit voltage, short current density (JSC), and fill factor (FF). Finally, the best PCE of 14.00% with a JSC of 21.75 mA cm−2 and a FF of 0.78 was achieved in low-temperature solution-processed PSCs, which represents a more than 40% enhancement in PCE over that of the PSCs without surface modification. Moreover, the devices exhibit good reproducibility and excellent stability. The simple FAI/IPA modification on the photoactive layer can greatly improve planar FAPbI3 based device performance, which can be a good choice for practical applications.
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
Advanced Energy Materials
·
2023
·Vol. 13
·期 17
·2300168
·
IF 27.8
Chang Xu,Liwei Cheng,Zexin Li,Xiangjun Zheng,Shiqi Shan,Tianyi Chen,Weifei Fu,Yingguo Yang,Lijian Zuo,Hongzheng Chen
Smooth perovskite film with high crystallinity and vertical orientation is highly favored for high-performance quasi-2D perovskite solar cells (PVSCs), yet limited by the critical balance between nucleation and crystal growth. To address this issue, here a fast solidification and slow growth (FSSG) strategy is developed to effectively optimize the film morphology. The fast solidification enables a smooth, pinhole-free film, while slow growth allows it to further ripen into high-crystallinity film. This process is enabled by the low-boiling point solvent system, that is, acetonitrile, with high-boiling point additives, that is, NH 4 SCN and CH 3 NH 3 Cl. Compared to the traditional method, uniform film with a larger grain/crystallite size as well as better crystallinity can be easily fabricated through this FSSG strategy. As a result, the quasi-2D PVSCs based on (GA) 2 (MA) 4 Pb 5 I 16 processed with the FSSG strategy show a champion power conversion efficiency of 20.44%, as well as 19.08% for large-area (1 cm 2 ) devices, which suggest the capability of the FSSG strategy for up-scaled PVSC fabrication. Therefore, this work opens a new avenue toward morphology control of PVSCs for practical applications.
研究领域:
材料科学
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能源技术
·
光伏器件研究
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产品关联
DOI
高影响因子
Science Advances
·
2025
·Vol. 11
·期 29
·
IF 12.5
Qian Teng,Qinghua Tan,Mengyue Hou,Jiajia Zhang,Fanglong Yuan
Lead-free tin perovskites present remarkable environmental advantages over lead-based counterparts. While substantial progress has been made with three-dimensional (3D) and 2D tin perovskite LEDs (PeLEDs), the potential of 0D tin perovskites—renowned for their exceptional optical properties and enhanced stability—remains largely unexplored for PeLEDs due to challenges in charge transport and injection. In this study, we introduce a binary host-guest strategy that overcomes these challenges, enabling the demonstration of bright and efficient 0D tin PeLEDs with orange and white light emission. By incorporating 0D tin bromide hybrid (HDAD) 3 SnBr 8 into a meticulously designed binary host system, we achieved PeLEDs with a maximum brightness exceeding 7500 candela meters −2 and an external quantum efficiency surpassing 7%. The remarkable device performance is primarily attributed to improved film morphology, enhanced charge carrier mobility, and optimized carrier balance. Furthermore, by tailoring the device structure, we realized white LEDs with a maximum luminance of 1800 candela meters −2 .
研究领域:
材料科学
·
光电子学
·
纳米技术
·
环境科学
·
固态照明
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganics
·
2025
·Vol. 13
·期 9
·295
·
IF 3
Shengcong Wu,Qiu Xiong,Abd. Rashid bin Mohd Yusoff,Peng Gao
Regulating the crystallization dynamics of perovskite films is key to improving the efficiency and operational stability of (FA0.83MA0.17Cs0.05)Pb(I0.85Br0.15)3perovskite solar cells (PSCs). However, precise regulation of the crystallization process remains challenging. Here, we introduce a reactive anti-solvent strategy based on the Kornblum reaction to modulate crystallization via in-situ chemical transformation. Specifically, trans-cinnamoyl chloride (TCC) is employed as a single-component anti-solvent additive that reacts with dimethyl sulfoxide (DMSO) in the perovskite precursor solution. The resulting acylation reaction generates carbonyl-containing products and sulfur ions. The carbonyl oxygen coordinates with Pb2+ions to form Pb–O bonds, which retard rapid crystallization, suppress heterogeneous nucleation, and facilitate the growth of larger perovskite grains with improved film uniformity. Additionally, the exothermic nature of the reaction accelerates local supersaturation and nucleation. This synergistic crystallization control significantly enhances the film morphology and device performance, yielding a champion power conversion efficiency (PCE) of 23.02% and a markedly improved fill factor (FF). This work provides a new pathway for anti-solvent engineering through in-situ chemical regulation, enabling efficient and scalable fabrication of high-performance PSCs.
研究领域:
材料科学
·
化学工程
·
可再生能源
·
纳米技术
·
应用物理
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Ziang Xie,Ping Wu,Sen Chen,Shiping Zhang,Yili Pei,Li Li,Guodong Fu,Ying Xie,Haochen Guan,Yun Xing,Jianzhang Zhu,Xinran Wang
The power conversion efficiency (PCE) of tin-based perovskite solar cells (TPSCs) was significantly improved when polyvinyl pyrrolidone (PVP) was doped into the formamidinium tin iodide (FASnI 3 ) layer with an optimized doping mass. After doping, the FASnI 3 grain size, film smoothness and average carrier lifetime were largely enhanced, which demonstrate the crystallization quality improvement to FASnI 3 . The champion PCE of the enhanced TPSC was improved to 7.83%, which is relatively 27% larger than that of the control, 6.15%. After continuous storage for 15 days, the PCE of the enhanced TPSC remained 74.4% of its original value. Using the finite difference time domain (FDTD) simulation method, we demonstrated that the light absorption ratio of the FASnI 3 :PVP layer was larger than that of the FASnI 3 , and the photo-generated carrier density of the enhanced TPSC was approximately 2% ∼ 3% larger than that of the control. The ultimate efficiency of the enhanced TPSC was calculated to be 26.23%. It is potential to dope PVP into FASnI 3 to further enhance the device performance of TPSCs.
研究领域:
材料科学
·
光伏技术
·
纳米科技
·
表面化学
·
半导体器件
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 21
·11377-11387
·
IF 11.9
Chao Zhou,Yonglei Han,Lei Cheng,Ruijie Ma,Fei Wang,Shuchen Weng,Guicheng Yu,Fang Lin,Kang Zhou,Hanlin Hu,Xiao Liang,Yongfei Wang,Haoran Lin,Gang Li
Two-dimensional (2D) Dion–Jacobson (DJ) halide perovskites are being intensively investigated owing to their superior stability compared with 2D Ruddlesden–Popper (RP) perovskites. Although various organic cations have been reported to form 2D DJ perovskites, their structure–property relationships are rarely studied. In this work, two novel organic cations MDAN (4,4′-methylenedianilinium) and EDAN (4,4′-ethylenedianilinium) were applied to form quasi-2D DJ perovskites with nominal layer number n = 6. An (EDAN)MA5Pb6I19:0.15MACl based inverted solar cell achieved a power conversion efficiency (PCE) of 13.2%, outperforms the 9.6% PCE achieved by a (MDAN)MA5Pb6I19:0.15MACl based device. The formation of quasi-2D perovskites with high-n values was observed for both compounds, while the superior performance is demonstrated by the (EDAN)MA5Pb6I19:0.15MACl based device, which could be attributed to its better film morphology and lower defect density. Intriguingly, we found that EDAN based quasi-2D perovskites were evenly distributed in the film while MDAN based quasi-2D perovskites concentrated near the film surface, accounting for an unfavorable electronic band alignment of the latter. Both (MDAN/EDAN)MA5Pb6I19:0.15MACl films remained unchanged in air with 50% relative humidity for 20 days. This work not only presents a decent device performance, but also explores understanding of tuning morphology towards high-efficiency quasi-2D Dion–Jacobson perovskite solar cells.
研究领域:
材料科学
·
光伏技术
·
有机-无机杂化钙钛矿
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）