CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Haipeng Jiang,Xin Qu,Li He,Zheng Lv,Dan Li,Fengyou Wang,Lin Fan,Jinghai Yang,Lili Yang,Yongsheng Yan
Additive engineering is an effective defect passivation strategy for perovskite solar cells since the functional groups of additives can form coordination with defects. With the diversification of additive molecule structure and their functional groups, the interaction among groups within molecules has become more and more remarkable. However, its corresponding influence mechanism on defects passivation of perovskite is still an open question. Herein, we pay attention to the long-range conjugation effect (LRCE) within additive molecules, since it can greatly influence the electron cloud density in the aromatic system and changes the inherent characteristics of functional groups to weaken their coordination ability. The electrostatic potential (ESP) and bond dissociation energy (BDE) calculation were used to prove that the relative position of –OH and –COOH groups within additives plays a great role in adjusting LRCE. And meta -structure of –OH and –COOH exhibits effective suppression on LRCE to make the groups maintain their inherent characteristics to the great extent. Based on this novel meta -structure additive design strategy, we selected 3-hydroxybenzoic acid (M2), 2-hydroxypyridine-4-carboxylic acid (M3) and 2-hydroxyquinoline-4-carboxylic acid (M4) as additives. These meta -position additives indeed effectively passivate the defects of perovskite films and gradually improve the device performance due to the introduction of heteroatom and more fused ring step by step. The MAPbI 3 -based device with M4 as additive achieved high V oc of 1.17 V and maximum power conversion efficiency (PCE) of 20.40%, and the hygroscopicity was further suppressed so that the unencapsulated PSCs stored for 1000 h in the atmospheric environment still maintain 80% of initial PCE. These results will open a new concept for the design of additive molecules for further development of PSCs.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 12
·7451-7457
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IF 3.945
Yifan Liu,Fei Zheng,Longlong Zhang,Weihua Ren,Zetong Sunli,Yufei Ma,Yuying Hao
Perovskite quantum dots (PQDs) are promising interface modification materials for perovskite solar cells (PSCs). However, due to the limitation of the preparation method, it is hard to use PQDs as substrates for the growth of perovskite films by the common solution process. In this work, by introducing the rare earth element Ce into PQDs with the vacuum freezing and drying technology, we have successfully improved the solvent stability of PQDs. Moreover, we propose a technology, PQD dynamically mediated growth of perovskite film (PDMG), to prepare high-quality perovskite films, which can avoid the formation of PQD charge-blocking layers. Thanks to the improvement of perovskite crystallinity and the charge transport ability, the PCE is improved from 10.44% to 12.14% for CsPbI2Br PSCs and from 14.43% to 16.38% for CsPbI3 PSCs. Our work opens an avenue for using PQDs as substrates in the fabrication of highly efficient PSCs.
研究领域:
材料科学
·
纳米技术
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太阳能
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2016
·
IF 4.732
Xian Hou,Tongtong Xuan,Hengchao Sun,Xiaohong Chen,Huili Li,Likun Pan
ZnGa 2 O 4 :Eu 3+ nanophosphor was synthesized through a hydrothermal method and used as an effective light down-shifting/converting material in mesoporous TiO 2 layer of perovskite solar cells (PSCs). The nanophosphor can convert the high energy incident photon into the photon(s) with lower energy, which can excite CH 3 NH 3 PbI 3 to generate more photo generated electron–hole pairs, and thus promote the incident light use ratio and increase the power conversion efficiency (PCE) of PSCs. After the incorporation of suitable amount of ZnGa 2 O 4 :Eu 3+ into PSCs, the cell PCE is increased to 13.80% with a photocurrent density of 23.68 mA cm − 2 and a highest PCE of 14.34% with a photocurrent density of 25.02 mA cm −2 is achieved, much higher than those of the cell without ZnGa 2 O 4 :Eu 3+ (PCE of 10.67% and photocurrent density of 20.2 mA cm −2 ). The enhanced photovoltaic performance by incorporating the nanophosphor into PSCs should be ascribed to the increased incident light use ratio and improved exciton generation rate.
研究领域:
材料科学
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纳米技术
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太阳能
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2025
·
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
DYES AND PIGMENTS
·
2019
·
IF 4.018
Xiaoxia Ye,Xiaojuan Zhao,Qingyun Li,Yunfei Ma,Wenwen Song,Yun-Yun Quan,Zhencao Wang,Mingkui Wang,Zu-Sheng Huang
Four novel benzotriazole-based donor-acceptor-donor (D-A-D) type hole transport materials (HTMs) BTA1-2 and DT1-2 are synthesized to investigate the effect of the acceptors on the photovoltaic performance of perovskite solar cells (PSCs). The acceptors include nonfused core (thiophene-benzotriazole-thiophene) and fused core (dithienopyrrolobenzotriazole, DTBT). Systematical investigation reveals that the acceptor greatly influences the absorption, energy level, hole transfer and extraction, and photovoltaic performances of the HTMs. The dopant-free HTMs DT1-2 with DTBT core exhibit better hole transfer and extraction performance, and then obtain better photovoltaic performance than that of BTA1-2 . Especially, the PSC using DT2 without any dopants obtains a power conversion efficiency of 13.22%, which is outperforming than that of spiro-OMeTAD (10.41%). When doping with Li-TFSI/TBP (lithium bis(trifluoromethylsulphonyl)imide/tert-butylpyridine), DT2 -based cell achieves an improved efficiency of 15.77%. In addition, the different alkoxyl chain lengths on triphenylamine has a significant impact on the conductivity, hole mobility, hole extraction, and photovoltaic performance. The stability testing of the PSCs shows that the four HTMs based devices display improved stability than spiro-OMeTAD. These results certify that the fused acceptor core DTBT is a promising core for efficient D-A-D type HTMs towards PSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Huan Bi,Yao Guo,Mengna Guo,Chao Ding,Shuzi Hayase,Hanjun Zou,Qing Shen,Gaoyi Han,Wenjing Hou
Although perovskite solar cells (PSCs) have achieved significant success, there are still some barriers to their commercialization , such as poor stability and unsatisfactory power conversion efficiency (PCE). Here, we report low-dimensionality engineering of perovskites using mercaptoethylammonium iodide (MEMI). Two-dimensional (2D) perovskite materials can simultaneously passivate the interface defects of the perovskite film and enhance carrier extraction. The PCE of the device increased from 20.85% for the control device to a resultant of 22.41% for the target device. Meanwhile, device stability was ameliorated after MEMI modification, and the stability of unencapsulated target devices decreased by 7.5% after aging in the dark air condition for 300 h. Finally, the notorious lead leakage was significantly suppressed. This work guides to create efficient and stable environmentally friendly PSCs through low-dimensional engineering.
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
Carbon Energy
·
2024
·
IF 19.5
Yuanyuan Zhao,Lei Gao,Qiurui Wang,Qiang Zhang,Xiya Yang,Jingwei Zhu,Hao Huang,Jialong Duan,Qunwei Tang
Suppressing nonradiative recombination and releasing residual strain are prerequisites to improving the efficiency and stability of perovskite solar cells (PSCs). Here, long-chain polyacrylic acid (PAA) is used to reinforce SnO 2 film and passivate SnO 2 defects, forming a structure similar to “reinforced concrete” with high tensile strength and fewer microcracks. Simultaneously, PAA is also introduced to the SnO 2 /perovskite interface as a “buffer spring” to release residual strain, which also acts as a “dual-side passivation interlayer” to passivate the oxygen vacancies of SnO 2 and Pb dangling bonds in halide perovskites. As a result, the best inorganic CsPbBr 3 PSC achieves a champion power conversion efficiency of 10.83% with an ultrahigh open-circuit voltage of 1.674 V. The unencapsulated PSC shows excellent stability under 80% relative humidity and 80°C over 120 days.
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
Nanoscale
·
2016
·Vol. 8
·期 12
·6600-6608
·
IF 7.76
Shimao Wang,Weiwei Dong,Xiaodong Fang,Qingli Zhang,Shu Zhou,Zanhong Deng,Ruhua Tao,Jingzhen Shao,Rui Xia,Chao Song,Linhua Hu,Jun Zhu
The role of remnant PbI2 in CH3NH3PbI3 films is still controversial, some investigations have revealed that the remnant PbI2 plays a passivation role, reduces the charge recombination in perovskite solar cells (PSCs), and improves the performance of PSCs, but the opposing views state that remnant PbI2 has no passivation effect and it would deteriorate the stability of the devices. In our investigation, the CH3NH3PbI3 films have been prepared by a two-step spin-coating method and the content of the remnant PbI2 in CH3NH3PbI3 films has been tuned by varying the preparation temperature. It has been found that increasing the heating temperature could increase the coverage of spin-coated PbI2 films, which has led to high coverage CH3NH3PbI3 films and more remnant PbI2 in CH3NH3PbI3 films, and as a result, the performance of PSCs was enhanced obviously and the maximum power conversion efficiency of 14.32 ± 0.28% was achieved by the PSCs prepared at 130/120 °C (PbI2 films were heated at 130 °C and CH3NH3PbI3 films were heated at 120 °C). Furthermore, the dark current, electrochemical impedance spectroscopy and time-resolved fluorescence emission decay measurements revealed that the charge recombination in PSCs has been gradually suppressed and the fluorescence emission lifetime has gradually increased with the content of remnant PbI2 increasing. Thus, the passivation effects of the unreacted and decomposed PbI2 in improving the performance of PSCs have been confirmed unquestionably.
研究领域:
材料科学
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光伏技术
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太阳能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Chenlong Zhang,Jialong Duan,Renni Luan,Ya Liu,Jingwei Zhu,Jie Dou,Yueji Liu,Qiyao Guo,Tianyi Liu,Xinyu Zhang,Linzheng Ma,Benlin He,Yuanyuan Zhao,Chongwen Li,Qingzhong Xue,Qunwei Tang
Achieving high-quality perovskite (ABX 3 ) film is the key to the improvement of efficiency and stability of perovskite solar cells (PSCs) for subsequent commercialization, yet traditional crystallization relying on the quick reaction between AX and BX 2 components often involves photoinactive intermediate phases and imperfections that go against the device performance. Herein, we report a new strategy for retarding perovskite crystallization and defect passivation by customizing the non-skeletal groups (such as -F, -H, -OC 2 H 5 and etc.) in covalent organic frameworks (COFs). Given the discernable charge transfer feature depending on donor-acceptor interaction strength, theoretical and experimental results demonstrate that, compared to the electron-donating group, the electron-withdrawing -F atoms induce local asymmetric electron distribution, forming a negative Lewis-base center at acceptor unit, a positive π-acidic center at donor unit, and a hydrogen bond center at side chain to discretely interact with PbI 2 , free I − anions and organic cations (formamidinium, FA + ). As a result, the F-functionalized-COFs enable micro-spatial all-components-delocalized crystallization and defect passivation, thus promoting the efficiency of inverted PSC up to 26.02%, along with the significantly improved stability after aging under 75°C for 1000 h, 10% relative humidity for 2000 h, and continuous illumination over 1100 h.
研究领域:
材料科学
·
光伏技术
·
有机-无机杂化材料
·
纳米材料
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
npj Science of Food
·
2023
·Vol. 7
·期 1
·1-13
·
IF 6.4
Xu Enbo,Niu Ruihao,Lao Jihui,Zhang Shengliang,Li Jie,Zhu Yiyuan,Shi Huimin,Zhu Qingqing,Chen Yijian,Jiang Yuyan,Wang Wenjun,Yin Jun,Chen Qihe,Huang Xiao,Chen Jun,Liu Donghong
Tissue-like cultured meats of some livestock have successfully been established by different approaches. However, the production of a structure similar to fish fillets is still challenging. Here, we develop tissue-like cultured fish fillets by assembly of large yellow croaker muscle fibers and adipocytes with 3D-printed gel. Inhibition of Tgf-β and Notch signals significantly promoted myogenic differentiation of piscine satellite cells (PSCs). The mixture of fish gelatin and sodium alginate combined with a p53 inhibitor and a Yap activator supported PSC viability and proliferation. Based on the texture of fish muscle tissue, a 3D scaffold was constructed by gelatin-based gel mixed with PSCs. After proliferation and differentiation, the muscle scaffold was filled with cultured piscine adipocytes. Finally, tissue-like fish fillets with 20 × 12 × 4 mm were formed, consisting of 5.67 × 10 7 muscles and 4.02 × 10 7 adipocytes. The biomanufacture of tissue-like cultured fish fillet here could be a promising technology to customize meat production with high fidelity.
研究领域:
生物技术
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食品科学
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemNanoMat
·
2022
·Vol. 8
·期 12
·e202200390
·
IF 3.82
Xueni Shang,Boxue Zhang,Deyu Gao,Mengjia Li,Chenglin Wang,Fanbin Meng,Cong Chen
Graphical A new three-dimensional organic spacer cation, 1,4-diazabicyclo [2,2,2] octane-1,4-diium (DABCO 2+ ) was developed to passivate defects and enhance the device stability. Low-dimensional additive engineering could effectively reduce the high-density trap defect density and improve the stability of perovskite solar cells (PSCs). To avoid the limiting effect of charge carrier transfer by incorporating the large-size long alkyl chain organic cations, we developed a new three-dimensional organic spacer cation, 1,4-diazabicyclo [2,2,2] octane-1,4-diium (DABCO 2+ ), to passivate the defects and enhance the device stability. DABCO 2+ with fine crystal structure and thermal stability could result in substantially fewer structural defects, enhance carrier lifetime, and inhibit nonradiative recombination loss. Structural analysis of CsFAPbI 3 perovskite doped with different concentrations of the three-dimensional organic spacer cations shows a clear correlation between the structure and the resultant perovskite films. Consequently, DABCO 2+ modified CsFAPbI 3 -based PSCs could achieve an optimized PCE of 23.02% with high stability exceeding 1500 h. This work opens a new approach to fabricating PSCs with enhanced stability for future commercial applications.
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
高影响因子
Acta Biomaterialia
·
2023
·
IF 9.7
Rongze Wang,Keze Hong,Qiaoyun Zhang,Jianrong Cao,Tao Huang,Zecong Xiao,Yong Wang,Xintao Shuai
Pancreatic ductal adenocarcinoma (PDAC) is characterized by a dense extracellular matrix flooded with immune suppressive cells, resulting in extremely poor clinical response to immunotherapy. It has been revealed that the activation of pancreatic stellate cells (PSCs) makes considerable contributions to the immunological “cold” tumor microenvironment (TME). Herein, we developed a polyamino acid-based nanodrug incorporating the PSC activation inhibitor calcipotriol and anti-CXCL12 siRNA. The nanodrug was easily prepared with a small particle size and is capable of penetrating pancreatic tumors to inactivate PSCs and downregulate CXCL12. The in vivo results of orthotopic pancreatic tumor treatment demonstrated that codelivery of calcipotriol and anti-CXCL12 siRNA remodeled the PDAC TME with reduced extracellular matrix and decreased immunosuppressive T cells . Eventually, the infiltration of cytotoxic T cells was increased, thereby acting with immune checkpoint blockade (ICB) therapy for immunologically “cold” pancreatic tumors. In the present study, we propose a promising paradigm to improve the immunotherapy outcome of PDAC using nanodrugs that synchronously inhibit PSC activation and regulatory T-cell infiltration. Statement of significance Pancreatic ductal adenocarcinoma (PDAC) is characterized by a dense extracellular matrix (ECM) that impedes the tumor infiltration of therapeutic agents and cytotoxic T lymphocytes, resulting in a poor clinical response to immunotherapy. In the present study, we proposed a promising approach for enhanced immunotherapy of pancreatic cancer. Specifically, a nanodrug incorporating calcipotriol and anti-CXCL12 siRNA was synthesized to synchronously inactivate matrix-producing pancreatic stellate cells and suppress the infiltration of regulatory T cells. The reduced ECM removed the pathological barrier, preventing nanodrug penetration and effector T-cell infiltration, leading to a conversion of the immunosuppressive “cold” microenvironment to a “hot” microenvironment, which eventually boosted the immunotherapy of anti-PD-1 antibodies in pancreatic cancer.
研究领域:
肿瘤学
·
药学
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免疫学
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纳米技术
·
癌症生物学
✓ 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）