APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Huangzhong Yu,Xinxin Huang,Chengwen Huang
In this study, novel nanocomposites consisting of zinc oxide (ZnO) and a polymer polyethylenimine ethoxylated (PEIE) are fabricated by blending sol–gel ZnO dispersions with different concentrations of PEIE in solution. The photoelectric properties of ZnO:PEIE composites are characterized by a series of testing methods. The results show that PEIE as a doping agent can effectively modify and passivate the surface of ZnO nanoparticles, and ZnO:PEIE composite at 0.1 wt% PEIE possesses the highest conductivity and the lowest work function. Moreover, the ZnO and ZnO:PEIE composites with different concentrations of PEIE are used as electron transport layers (ETLs) in polymer solar cells (PSCs). Compared to pure ZnO as ETL, the power conversion efficiency (PCE) of the device based on P3HT:PCBM with ZnO:PEIE (0.1 wt% PEIE) as ETL is effectively improved from 3.01% to 3.52%. For the device based on PTB7:PCBM with ZnO:PEIE (0.1 wt% PEIE) as ETL, the PCE is improved from 6.92% to 8.03%. It is found that PEIE can not only reduce the surface defects and traps of ZnO nanoparticles, but also prevent the aggregation of ZnO precursor. Moreover, the addition of PEIE does not change the shape of synthetic nanometer ZnO materials, and the Fermi level of ZnO thin films is also gradually decreased with the addition of PEIE, which helps to reduce the electronic transmission barrier. Accordingly, ZnO:PEIE composites can be effective ETLs in PSCs.
研究领域:
材料科学
·
能源科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2019
·Vol. 4
·期 2
·1900231
·
IF 0
Si Liu,Lusheng Liang,Lingyi Meng,Xiangdong Tian,Zhuangzhuang Zhang,Yaming Yu,Zhang Lan,Jihuai Wu,Jiaoxia Zhang,Peng Gao
Perovskite solar cells (PSCs) have been widely studied during the past 10 years. Albeit the excellent light-absorption ability, the thickness of the perovskite layer is limited to maintain effective control over morphology and carrier migration. Meanwhile, the quality of perovskite films is a crucial factor affecting the performance of final devices. The traditional one-step process for preparing triple-cation perovskite films suffers from small grain size, low crystallization quality, and many surface defects. Herein, in the process of triple-cation perovskite-based solar cells, a facile dosing strategy of a silver nanorods (AgNR) aqueous solution into the perovskite precursor is adopted. The localized surface plasmon resonance effect of AgNR enhances the light-capture ability of the perovskite layer without increasing the thickness. At the same time, the presence of appropriate water helps to obtain high-quality perovskite films with larger grain size and fewer defects. It is found that the synergy of AgNR and water successfully reduces the defect density and increases mobility significantly. Consequently, a power conversion efficiency of 20.18% and a short-circuit current ( J SC ) of 22.08 mA cm −2 is achieved. Meanwhile, an excellent fill factor beyond 82% is reported, which is one of the highest values for triple-cation hybrid PSCs.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
ChemNanoMat
·
2022
·Vol. 9
·期 1
·e202200377
·
IF 3.82
Jazib Ali,Yu Li,Jingnan Song,Ming Zhang,Guanqing Zhou,Jinqiu Xu,Lei Zhu,Ahmad Hussain,Firoz Khan,Feng Liu
Graphical Introducing fullerene (PC 61 B) into a non-fullerene (CO i 8DFIC) acceptor suppresses its high crystallization nature, showed good inter-molecule mixing, reduced intermolecular distances and decent morphology, resulting in excellent charge carrier transport properties and benefits from the order phase of fullerene. This study reports a blend of [6, 6]-phenyl-C61-butyric acid methyl ester (PC 61 BM) and CO i 8DFIC non-fullerene acceptor (NFA) as an electron transport layer (ETL) in perovskite solar cells (PSCs). This mixed small-molecule ETL showed good inter-molecule mixing, reduced intermolecular distances and decent morphology, resulting in excellent charge carrier transport properties. Morever, charge carrier extraction and transport at the perovskite/ETL interface was optimized by reducing surface traps and defects due to the passivation ability of various terminal groups from the CO i 8DFIC molecule. A high power conversion efficiency (PCE) of 19.12 % was achieved by taking advantage of benefits from both molecules, showing much better performance than the invidual PC 61 BM or CO i 8DFIC (7.13% for using the NFA only). Moreover, the storage and ambient stabilities of the mixed ETL-based PSCs increased dramatically compared to control devices.
研究领域:
材料科学
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能源技术
·
光伏器件
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Nian Sha,Hari Bala,Can Chen,Bowen Zhang,Wei Zhang,Xiangli An,Diandian Chen,Zhiyong Zhao
In this study, we report a facile method to enhance the photovoltaic performance of solar cells based on carbon-counter-electrode by introducing NaF additives into the CH 3 NH 3 PbI 3 (MAPbI 3 ) film. The NaF additives can not only promote the crystallization of perovskite polycrystals but also help to form uniform, high-coverage, and high-quality perovskite films, leading to better light absorption and hydrophobicity. The device with addition of NaF has a maximum power conversion efficiency (PCE) of 11.26%, which is significantly higher than those without NaF (7.66%). Furthermore, the devices with the NaF additive exhibit superior stability, as they retained more than 95% of the original PCE after 2400 h in a humid atmosphere, which is considered to be associated with the presence of NaF and carbon electrode.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jin Huang,Hao Wang,Chunyang Chen,Yizhe Tang,Husheng Yang,Shengzhong Liu,Dan Zhang
All-inorganic CsPbI 3 perovskite solar cells (PSCs) play a significant role in the new generation photovoltaic technology because of their unique optical band gap and excellent light absorption performance. However, the generation of defect states during the fabrication will cause serious non-radiative recombination and film degradation. Therefore, a new organic additive 4-Thioureidobenzoic acid (4-TBA) was introduced to decrease the defect density and optimize the device performance in this work. Thiourea group and carboxyl group in 4-TBA could not only be anchored on the film surface to passivate uncoordinated Pb 2+ defects as bilateral Lewis base, but also form the adjustable skeleton at the grain boundaries to fill Cs + vacancies, support perovskite framework, boost the charge transfer and enhance the film crystallinity. Owning to the hydrophobicity of benzene ring structure of 4-TBA, the hydrophobic protective layer could be formed on the film surface and grain boundary to isolate the damage of external moisture to the device. Furthermore, with the release of residual stress in the film, the stability of device is substantially improved. Eventually, the 0.02 mol% 4-TBA based device prepared by one-step spin-coating method possesses an ultra-high power conversion efficiency (PCE) of 20.26%, which is one of the greatest efficiencies of all-inorganic CsPbI 3 PSC at present. Surprisingly, after 1000 h of environmental stability test, the optimized device still maintains 95.6% of original efficiency without encapsulation, and the PCE attenuation is only 4.4%, showing excellent long-term stability.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 31
·16032-16040
·
IF 5.968
Dongdong Cai,Qingdong Zheng,Shan-Ci Chen,Qikai Zhang,Can-Zhong Lu,Yu Sheng,Deqin Zhu,Zhigang Yin,Changquan Tang
Four semiconducting copolymers were designed and synthesized based on a novel ladder-type heteroheptacene building block, which was prepared in four steps from 3,7-dibromodibenzo[b,d]thiophene. The copolymers were characterized by 1H NMR spectroscopy, UV-Vis absorption spectroscopy, cyclic voltammetry and their molecular weights were estimated using gel permeation chromatography. Field effect transistors (FETs) fabricated from these four polymers exhibit semiconducting behavior in air. The highest mobility of 2.21 × 10−4 cm2 V−1 s−1 was found in the polymer copolymerized from the ladder-type heteroheptacene and terthiophene. Low band-gap donor–acceptor copolymers with a deep-lying HOMO energy level were synthesized by a copolymerization between the ladder-type heteroheptacene donor and the 2,1,3-benzothiadiazole acceptor. Polymer solar cells made from one of these polymers gave a power conversion efficiency of 4.17%, a current density of 9.2 mA cm−2, an open-circuit voltage of 0.79 V, and a fill factor of ∼57.4% under 100 mW cm−2 AM 1.5 G sunlight illumination.
研究领域:
材料科学
·
有机电子学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 36
·12560-12567
·
IF 7.059
Linlin Qiu,Lika Dong,Deqiang Mei,Wei-Hsiang Chen,Lixin Song,Jieqiong Wang,Jiacheng Zou,Pei-Cheng Jiang,Pingfan Du,Jie Xiong
Perovskite films can be prepared using sec-butyl alcohol (2-BA) by a one-step antisolvent assisted method. However, 2-BA dissolves a necessary perovskite precursor, methylammonium iodide, CH3NH3I, (MAI), which is lost during the fabrication, leaving behind residues of another perovskite precursor, PbI2. The resulting perovskite films show reduced power conversion efficiency (PCE) and poor stability to ambient conditions. In this work, we propose an elegant strategy, i.e., the introduction of a small amount of MAI dissolved in the antisolvent 2-BA (1 mg mL−1). The additional MAI can react with the residual PbI2 during the fabrication to form the desired organic–inorganic hybrid perovskite material, CH3NH3PbI3. The high-quality of the perovskite films obtained can provide larger grain sizes and smoother surfaces, with an ideal PCE of 19.29% and superior moisture stabilities.
研究领域:
材料科学
·
太阳能技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Weidong Zhu,Lei Kang,Tao Yu,Bihu Lv,Yangrunqian Wang,Xingyu Chen,Xiaoyong Wang,Yong Zhou,Zhigang Zou
Herein, we demonstrate that the facile face-down annealing route which effectively confines the evaporation of residual solvent molecules in one-step deposited precursor films can controllably enable the formation of (110) textured CH3NH3PbI3 films consisting of high-crystallinity well-ordered micrometer-sized grains that span vertically the entire film thickness. Such microstructural features dramatically decrease nonradiative recombination sites as well as greatly improve the transport property of charge carries in the films compared with that of the nontextured ones obtained by the conventional annealing route. As a consequence, the planar-heterojunction perovskite solar cells with these textured CH3NH3PbI3 films exhibit significantly enhanced power conversion efficiency (PCE) along with small hysteresis and excellent stability. The champion cell yields impressive PCE boosting to 18.64% and a stabilized value of around 17.22%. Particularly, it can maintain 86% of its initial value after storage for 20 days in ambient conditions with relative humidity of 10–20%. Our work suggests a facile and effective route for further boosting the efficiency and stability of low-cost perovskite solar cells.
研究领域:
材料科学
·
光伏技术
·
太阳能电池
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jialiang Shi,Haozhen Deng,Fengli Liu,Ruoshui Li,Xiaosong Qiu,Yongsheng Tu,Liyu Wu,Yuan Xu,Jingxu Tian,Chenwei Zhu,Jihuai Wu,Zhang Lan
Compared with organic–inorganic hybrid perovskite solar cells (PSCs), carbon-based all-inorganic PSCs have the advantages of low preparation cost, simple process, and good thermal stability. Here, three polar materials of 4-tert-Butylpyridine halides (tBPX: X = Cl, Br, I) are modified between the perovskite absorbent layer and the carbon electrode. On the one hand, the introduction of tBPX effectively improves the dielectric constant of perovskite nanocrystals and reduces the carrier trapping ability of defects. On the other hand, the structural–functional groups act on the perovskite interface, effectively passivate the surface defects of the perovskite nanoscale thick film, and reduce the nonradiative recombination loss of carriers. In addition, the interface modification of tBPX forms a hydrophobic protective barrier, which significantly improves the moisture resistance of the device. As a result, the carbon-based CsPbI2Br PSCs achieve a power conversion efficiency (PCE) of 14.39%, which is higher than 12.79% of the pristine device. The optimized device can maintain more than 80% of the original efficiency after 800 h of aging under a 20 ± 5% relative humidity in the atmospheric environment. Therefore, it provides an idea for the preparation of efficient and stable carbon-based all-inorganic PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Crystals
·
2024
·Vol. 14
·期 9
·802
·
IF 2.4
Tengteng Li,Fupeng Ma,Yafeng Hao,Huijia Wu,Pu Zhu,Ziwei Li,Fengchao Li,Jiangang Yu,Meihong Liu,Cheng Lei,Ting Liang
Sn-Pb perovskite solar cells, which have the advantages of low toxicity and a simple preparation process, have witnessed rapid development in recent years, with the power conversion efficiency for single-junction solar cells exceeding 23%. Nevertheless, the problems of poor crystalline quality of Sn-Pb perovskite films arising from rapid crystallization rate and facile oxidation of Sn2+to Sn4+have become key issues for the further development of Sn-Pb perovskite solar cells. Herein, we report the incorporation of triazinamide (N-(6-methyl-3-oxo-2,5-dihydro-1,2,4-Triazin-4(3H)-YL) acetamide) as an additive to regulate the crystalline growth of Sn-Pb perovskite films, resulting in films with low trap density and large grain size. The triazinamide additive effectively passivated defects in the perovskite films. As a result, the triazinamide-modified perovskite solar cells achieved a higher efficiency of 15.73%, compared with 13.32% for the control device, significantly improving device performance. Notably, the optimal triazinamide-modified perovskite solar cell maintained 72% of its initial power conversion efficiency after being stored in an air environment for nearly 300 h, while only 18% of the power conversion efficiency of the control perovskite solar cell was retained. This study proposes an effective strategy for fabricating highly efficient and stable Sn-Pb perovskite solar cells.
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
Small
·
2025
·
IF 12.1
Meidan Que,Shenghui He,Yutian Li,Yuan Xu,Bo Li,Jian Wei,Lili Gao,Wei Huang,Shengzhong Liu
Organic–inorganic formamidinium lead triiodide (FAPbI 3 ) hybrid perovskite quantum dots (QDs) have garnered considerable attention in the photovoltaic field due to their narrow bandgap, exceptional environmental stability, and prolonged carrier lifetime. Unfortunately, their insulating ligands and surface vacancy defects pose significant obstacles to efficient charge transfer across device interfaces. In this work, an electrostatic harmonization strategy at the interface using a donor-acceptor dipole molecular attachment to achieve enhanced charge separation capabilities on the QD surface is ventured. On the basis of theoretical study and experimental evaluation, it has gained a comprehensive understanding of dipole-induced electronic restructuring at the quantum dot interfaces. It reveals that 3-fluoro-4-iodopyridine as a dipole source with appropriate energy levels and a high dipole moment effectively fills surface iodine vacancies (V I- ), leading to rapid separation of photoexcited charge carriers. Particularly enhanced hole mobility and hydrophobicity are achieved through strong electronegative effects of fluorine and iodine. Consequently, the FAPbI 3 QD solar cells achieve a power conversion efficiency as high as 14.11% with exceptional long-term stability in ambient. These perceptions provide effective interface engineering means for the hybrid perovskite QDs to advance their potential in high-performance optoelectronic applications.
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
OPTICAL MATERIALS
·
2024
·
IF 3.8
Ying Zhang,Xin Liu,Yonggang Zhao,Zhineng Zhou,Yufei Chen,Congyan Xu,Xinghuan Hu,Xu Su,Lang Wu,Xiaoyu Jin,Shurong Wang
In recent years, there is significant interest in Cu 2 SnS 3 (CTS) thin film solar cells owing to the eco-friendly nature and abundant elemental composition. However, the efficiency prepared in laboratory settings for these solar cell remains relatively low, primarily due to serious open-circuit voltage losses. Cation substitution is one of the strategies to alleviate this problem. In this work, Ag and Ge dual-cation substitution in CTS is proposed, which occupy partial Cu and Sn lattice sites respectively. Investigation reveals that substituting Cu with part Ag increases the band gap slightly, promotes grain growth, and improves crystallinity of CTS films. Simultaneously, Ge incorporation shifts the conduction band upwards to some extent, while reducing grain boundaries, due to increasing the grain size. As a result, the incorporation of 6 % Ag resulted in an optimal efficiency (PCE) of 2.78 %. Furthermore, employing dual-cation substitution with 6 % Ag and 6 % Ge is employed, the CTS device achieved an optimal efficiency of 3.15 %. This work develops the synergistic effect of Ag and Ge dual-cation substitution in CTS device and confirms that this approach can improve device performance, thus providing new research ideas for advancing the development of CTS device.
研究领域:
材料科学
·
太阳能电池研究
✓ 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）