Small
·
2025
·
IF 12.1
Qianfeng Gao,Jianghao Liu,Zhiyuan Xu,Yu Yan,Wei Li,Taiqiang Wang,Hongyu Dun,Jiakai Zhou,Ke Tao,Baojie Yan,Bo Yu,JinChao Shi,Qian Huang,Xiaodan Zhang,Ying Zhao,Guofu Hou
Dopant-free crystalline silicon (c-Si) solar cells face critical challenges in hole transport layer (HTL) design, where conventional molybdenum oxide (MoO x ) contacts suffer from interface oxidation and insufficient electron blocking. While self-assembled monolayers (SAMs) demonstrate potential in organic photovoltaics, their application in silicon-based HTLs remains unexplored. In this study, a novel organic SAM (2PACz) is proposed, where phosphonic acid (PA) groups form strong coordination bonds with MoO x as HTL, aiming to improve cell performance via both chemical and field-effect passivation. The incorporation of 2PACz raises the work function of MoO x by 0.66 eV and significantly improves the minority carrier lifetime, which, in turn increases the built-in potential ( V bi ) to 1.06 V. These improvements contribute to a boost in both open-circuit voltage ( V oc ) and short-circuit current ( J sc ). Finally, the solar cell with 2PACz/MoO x -Au NPs-MoO x (MAM) stack achieves a V oc of 753.3 mV, a J sc of 40.10 mA cm − 2 , a fill factor ( FF ) of 79.12%, and a conversion efficiency ( E ff ) of 23.90%. The application of 2PACz in the HTL significantly enhances solar cell performance, offering a novel strategy for interface optimization in c-Si solar cells and other optoelectronic devices.
研究领域:
材料科学
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光伏技术
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半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO LETTERS
·
2018
·
IF 12.08
Meiying Leng,Ying Yang,Zhengwu Chen,Wanru Gao,Jian Zhang,Guangda Niu,Dengbing Li,Haisheng Song,Jianbing Zhang,Song Jin,Jiang Tang
Metal halide perovskite quantum dots (QDs) recently have attracted great research attentions. However, blue-emitting perovskite QDs generally suffer from low photoluminescence quantum yield (PLQY) because of easily formed defects and insufficient surface passivation. Replacement of lead with low toxicity elements is also preferred toward potential commercial applications. Here, we apply Cl-passivation to boost the PLQY of MA3Bi2Br9 QDs to 54.1% at the wavelength of 422 nm, a new PLQY record for blue emissive, lead-free perovskite QDs. Because of the incompatible crystal structures between MA3Bi2Br9 and MA3Bi2Cl9 and the careful kinetic control during the synthesis, Cl– anions are engineered to mainly locate on the surface of QDs acting as passivating ligands, which effectively suppress surface defects and enhance the PLQY. Our results highlight the potential of MA3Bi2Br9 QDs for applications of phosphors, scintillators, and light-emitting diodes.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xuzheng Feng,Xing Li,Zhuoxin Li,Yufei Xue,Xianggang Chen,Xiaoxu Sun,Jixiang Tang,Shuyi Liu,Zishuo Wang,Yuhang Xie,Rui Jia,Songyuan Dai,Guoping Gao,Molang Cai
Wide-bandgap perovskite solar cells (WBG PSCs) have been receiving increasing focus due to the ideal application in tandem photovoltaics. Nonetheless, WBG perovskites tend to form high-density trap states, causing serious nonradiative recombination and phase segregation, which is detrimental to the efficiency and stability of WBG PSCs. In this work, a dual-field passivation strategy facilitated by isopropylamine hydroiodide (i-PAI) is introduced, in effect, showing both the molecular dipole field passivation and interface electric field passivation. This strategy reduces the charge trap density of WBG perovskite and suppresses the phase segregation, which is supported by the analysis of the experimental data and simulation results. Moreover, the dual functional passivation mitigates the open-circuit-voltage (VOC) deficit of the WBG (1.65 eV) PSCs to 0.39 V and increases the efficiency to a competitive value of 22.21%. The device also exhibits excellent photostability, maintaining 84.2% of the initial efficiency after 1080 h of illumination under 1-sun white LED. This work showcases a pivotal pathway to defect passivation that can markedly enhancing both the efficiency and stability of wide-bandgap perovskite solar cells.
研究领域:
材料科学
·
能源技术
·
光伏研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL PHYSICS
·
2023
·Vol. 158
·期 13
·
IF 4.4
Ye Xiaofang,Cai Hongkun,Xu Tie,Ni Jian,Zhang Jianjun
In recent years, perovskite solar cells (PSCs) have been attracting more and more attention. Although perovskite materials have high defect tolerance, defects remain the main factor that seriously affects the efficiency and stability of PSCs. Herein, the ionic liquid of 1-butyl, 3-methylimidazolium acetate ([BMIM][ACO]) was introduced into the SnO2/perovskite interface for the first time. Thanks to the dipoles formed by ILs spontaneously, the work function of SnO2 was reduced and the transport ability of carriers was improved as well. Moreover, the Lewis acidity and lone pair electrons of [BMIM][ACO] contribute to the passivation of I– defects, Pb2+ defects, or Pb-I anti site defects. In addition, the presence of dipoles will repel the approach of photogenerated holes and the reverse transport of electrons, reducing the recombination of defect sites through field-effect passivation. The solar cell with efficiency of 19.43% was obtained under such a dual passivation effect, and the best device maintained 75.21% of the initial efficiency after 80 h of continuous illumination.
研究领域:
材料科学
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能源技术
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物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Communications Materials
·
2024
·Vol. 5
·期 1
·1-9
·
IF 7.5
Tao Yuli,Liang Zheng,Ye Jiajiu,Xu Shendong,Zhang Hui,Xu Huifen,Cao Chentai,Yang Quan,Abbas Zameer,Liu Guozhen,Pan Xu
With the area of perovskite films and devices increases, the performance tends to deteriorate, which can be attributed to the accumulation of defects at the bottom surface without proper passivation. Here, we introduce the 1-(4-Fluorophenyl)−2-pyrrolidone molecule (FPP) as additive in large-area blade-coating perovskite films. During the top-down crystallization process, the FPP molecule form an intermediate phase with the perovskite components and subsequently self-deposit at the bottom surface. Consequently, the crystallization kinetics of the large-area thin films are regulated, and the bottom surface is effectively and uniformly passivated in one single-step processing. By employing this self-deposited passivation method (SDP), the efficiency decrease caused by the expansion of the device area has been significantly suppressed and the devices yield power conversion efficiency of 23.41% (0.09 cm 2 ), 22.43% (1 cm 2 ), and 20.75% (24 cm 2 ). The method is compatible for commercial manufacturing with scaling up solar cell area and holding high efficiency.
研究领域:
材料科学
·
光伏技术
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2021
·Vol. 5
·期 10
·2100416
·
IF 8.582
Lili Gao,Hang Su,Zhuo Xu,Yingjie Hu,Jing Zhang,Shengzhong (Frank) Liu
In perovskite solar cells, not only defects on the top perovskite film surface seriously affect device performance, those buried in the bottom perovskite–electron-transfer layer (ETL) interface damage carrier extraction, transport, and device efficiency as well. Herein, a novel double-sided passivation strategy is designed using a single π-conjugation-induced 1-pyrenesulfonic acid sodium salt (PyNa + ). It is found that it effectively passivates top and bottom interface defects to render high device performance. The π-conjugated pyrene-containing sodium salt electronically contributes to the surface band edges and influences the carrier dynamics by passivating defects at both top hole-transfer layer (HTL)–perovskite and bottom perovskite–ETL interfaces. The density functional theory (DFT) calculation confirms that the Pb cluster and I—Pb antisite defects can be effectively passivated by the O···Pb coordination and electrostatic interaction of PyNa + . The carrier lifetimes are prolonged, the interface defect density is effectively reduced as measured by space-charge-limited current (SCLC). Through the double layer passivation of PyNa + , the device delivers improved power conversion efficiencies of 21.22% relative to that of a reference perovskite, and enhanced stability with 85% of original efficiency after 1440 h in atmospheric environment. Double-sided passivation provides a comprehensive strategy for high-performance perovskite solar cells.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yadong Wang,Guosheng Niu,Xiaofei Cao,Zhichao Yang,Yuan Dong,Guitao Feng,Yingliang Liu,Jizheng Wang,Shaokui Cao
Organic-inorganic hybrid perovskites have already been employed as promising light-sensitive materials for high-performance photodetectors (PDs) due to their intriguing optoelectronic features. Nonetheless, such perovskite-based PDs often suffer from low sensitivity, high dark current and inevitable degradation. In this work, a novel multifunctional molecule l -tryptophan ethyl ester hydrochloride ( l -TEEH) was used to treat the surface defects of triple-cation mixed halide perovskite film. It is found that the modulator with multiple functional groups can effectively passivate the uncoordinated ions (Pb 2+ and I - ) and halide (I and Cl) vacancies of the perovskite film. Owing to the reduced defects, the dark current of the pristine perovskite PD significantly decreases from ∼ 10 -9 A to ∼ 10 -11 A after the l -TEEH treatment. Moreover, the perovskite PD with the l -TEEH treatment exhibits a large photoresponsivity (1.27 A/W) and an ultrahigh on/off ratio (∼9 × 10 3 ). More impressively, the optimized device shows excellent stability in air with a relative humidity of 40–50 %. Furthermore, the reliable imaging capability of perovskite device with the l -TEEH treatment is also successfully demonstrated.
研究领域:
材料科学
·
光电技术
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Yi Chen,Zhu Ma,Tangjie Yu,Zhuowei Du,Wei You,Junbo Yang,Shanyue Hou,Yanlin Li,Qianyu Liu,Wenwen Li,Qian Zhang,Hao Du,Yixian Li,Fuchun Gou,Qiang Yang,Guoming Li,Yuelong Huang,Kuan Sun,Yaohua Mai,Wei Long
Interface defect is one of the main factors that lead to non-radiative recombination of carriers at the interface and the decomposition of perovskites . This ultimately results in low efficiency and poor stability of perovskite solar cells (PSCs). Here, a passivated molecule called 2-Aminopyridine (2-APy) was proposed to reduce the defects of the interface between the perovskite and the hole transport layer. The results showed that the amino group in 2-aminopyridine can interact with the vacancy and free iodide ions on the surface of perovskite, thus passivating the defects at the interface and enhancing the hole transport capacity. As a result, 2-APy-modified PSCs exhibited inhibited non-radiative recombination, and the efficiency of PSCs increased to 21.46 %. The increase in the efficiency of PSCs is primarily seen in the rise of the open circuit voltage (V OC , from 1.12 to 1.15 V) and short circuit current (J SC , from 22.86 to 23.77 mA/cm 2 ). This work demonstrates that pyridine is an effective group for passivating the defects between the perovskite layer and the hole transport layer.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Optoelectronics
·
2023
·Vol. 16
·期 1
·1-11
·
IF 5.4
He Jungang,Ge You,Wang Ya,Yuan Mohan,Xia Hang,Zhang Xingchen,Chen Xiao,Wang Xia,Zhou Xianchang,Li Kanghua,Chen Chao,Tang Jiang
Lead selenide (PbSe) colloidal quantum dots (CQDs) are suitable for the development of the next-generation of photovoltaics (PVs) because of efficient multiple-exciton generation and strong charge coupling ability. To date, the reported high-efficient PbSe CQD PVs use spin-coated zinc oxide (ZnO) as the electron transport layer (ETL). However, it is found that the surface defects of ZnO present a difficulty in completion of passivation, and this impedes the continuous progress of devices. To address this disadvantage, fluoride (F) anions are employed for the surface passivation of ZnO through a chemical bath deposition method (CBD). The F-passivated ZnO ETL possesses decreased densities of oxygen vacancy and a favorable band alignment. Benefiting from these improvements, PbSe CQD PVs report an efficiency of 10.04%, comparatively 9.4% higher than that of devices using sol-gel (SG) ZnO as ETL. We are optimistic that this interface passivation strategy has great potential in the development of solution-processed CQD optoelectronic devices. Graphical Abstract
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yanmei Zhou,Shaoru Wu,Guobin Huang,Jingbin Zeng,Benjamin Edem Meteku,Xiaohong Tan,Heng Lu,Feiming Li,Zhixiong Cai,Xudong Wang,Maosheng Zhang
Intrinsic and surface defects are the crucial factors that affect the stability and luminescence efficiency of nanocrystals (NCs). Ion-doping and surface passivation are considered as the most effective strategies to suppress the intrinsic and surface defects of NCs, respectively. Herein, an efficient and facile double passivation process, simultaneously realizes ion-doping and surface passivation, for Cs 3 Cu 2 X 5 (X Cl, Br and I) NCs is developed by using potassium oleate (K-OA) as passivator. K ion is used as ion-doping passivation and OA ion is used as the organic ligand for surface passivation of NCs. Compared to the free passivated NCs, the Photoluminescence quantum yield (PLQYs) of dual-passivated Cs 3 Cu 2 X 5 (X Cl, Br and I) NCs increase significantly from 2.87%, 11.6% and 49.4–31%, 69.9%, and 97.2%, respectively. Moreover, the stability of proposed NCs is greatly improved (Cs 3 Cu 2 Cl 5 NCs maintain 63% of PL efficiency after 100 h, Cs 3 Cu 2 Br 5 and Cs 3 Cu 2 I 5 NCs maintain 65% and 97% of PL efficiency after 100 days, respectively) at 50–86% relative humidity and room temperature under ambient atmosphere.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Kangming Ou,Jiale Liu,Junwei Xiang,Chaoyang Wang,Jiayu Xie,Xiaoyu Li,Yanjie Cheng,Qiaojiao Gao,Lingya Gao,Anyi Mei,Yang Zhou,Hongwei Han
The stacking of multiple defect-rich grain boundaries (GBs) along the long transportation path (∼3 μm) of charge carriers in printable mesoscopic perovskite solar cells (p-MPSCs) impedes their power conversion efficiency (PCE). Organic Lewis bases are widely utilized for defect passivation at GBs, but how their passivation efficiency affects energy loss remains unclear. Here we employed triphenylphosphine (TPP) and triphenylphosphine oxide (TPPO) as the model passivators in p-MPSCs. TPPO has a more negatively charged center than TPP, which enables its stronger coordination with one of the most common and detrimental defects at the GBs—undercoordinated lead. When added into the perovskite with the same ratio, TPPO passivates defects more significantly and thus less TPPO remaining inactive compared with TPP. Inactive organic passivators accumulated at the GBs could impose barriers to charge carrier transportation. Indeed, TPPO improves the device performance more significantly with a champion PCE of 20.54% achieved. Besides, the TPPO devices demonstrate excellent stability with 95% of initial PCE remaining after 600 h of maximum power point tracking at (55 ± 5)°C.
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
Environmental Science-Nano
·
2024
·
IF 5.8
Weifeng Wu,Mengke Li,Jiang Tian,Feng Li,Yun Liu
Acid mine drainage (AMD) is a harmful effluent from mining activities. Surface passivation technology can prevent AMD production by coating minerals with passivation films. Previous study reported a composite passivator comprising γ-mercaptopropyltrimethoxysilane (PropS-SH) and halloysite loaded with benzotriazole (BTA). However, two issues persist in this work: the organosilane-based passivator requires passivating pyrite at 50~100 °C, and the encapsulation method for the guest passivator in halloysite is limited. To address these challenges, a novel self-healing composite passivator (PLHP passivator) was synthesized, using PropS-SH and lawsone as the main passivation agents and halloysite loaded with 8-HQ as the nanofillers. Polyelectrolytes were employed as the encapsulant within the nanofillers. The formation of a hydrophobic coating on the PLHP coated pyrite surface was revealed by SEM and contact angle tests. The enhanced oxidation resistance of PLHP coated pyrite over raw pyrite and other coated pyrite was verified by electrochemical measurements and chemical leaching tests. Notably, the PLHP coatings could passivate pyrite at room temperature, exhibiting excellent long-term stability and self-healing ability. Furthermore, the incorporation of polyelectrolytes expanded the application range of guest passivator. This paper provides new insights into overcoming the limitations of organosilane-based passivation and self-healing methods in current technology.
研究领域:
环境科学
·
材料化学
✓ 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）