SYNTHETIC METALS
·
2018
·
IF 2.526
Yingqiang Li,Xin Qi,Weiping Wang,Chao Gao,Ning Zhu,Ganghong Liu,Yuqing Zhang,Fang Lv,Bo Qu
A small molecule 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone)-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3- d :2′,3′- d ′]- s -indaceno[1,2- b :5,6- b ′]-dithiophene (ITIC) was used as the additive for the electron transport layer (ETL) of phenyl-C61-butyric acid methyl ester (PC 61 BM) in planar inverted perovskite solar cells (PSCs) fabricated by the flash method. Due to the proper LUMO level and decent electrical conductivity of ITIC, the photovoltaic properties of planar inverted PSCs based on the smooth PC 61 BM:ITIC (2 wt%) ETL were promoted, and the power conversion efficiency (PCE) and the short-circuit current density (J sc ) of the devices were increased to 12.41% and 18.53 mA cm −2 , respectively, which were 13.3% and 13.5% enhancements relative to those of the undoped control devices. Therefore, ITIC was a promising additive for PC 61 BM ETL in inverted PSCs and the photovoltaic properties of devices could be improved accordingly.
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
ACS Applied Energy Materials
·
2022
·
IF 6.959
Yuanyi Liu,Tianxing Xiang,Bing Zhang,Jize Wang,Xinxin Yu,Yueyue Xiao,Junyan Xiao,Zhiliang Ku,Yong Peng
Current CsPbBr3 perovskite solar cells still suffer from a high open-circuit voltage (Voc) loss due to the high defect density. Herein, we demonstrate a strategy to passivate defects and induce Fermi level modification through BaI2 doping. The carrier lifetime is significantly extended after adding BaI2. In addition, the Fermi level is changed as Ba2+ enters the crystal lattice, which increases the built-in potential and promotes the transport of carriers. As a result, the optimized thermally evaporated device shows a record Voc of 1.551 V and an improved power conversion efficiency of 10.09% as well as excellent thermal stability.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Chenliang Wang,Hong Yang,Xuefeng Xia,Xiaofeng Wang,Fan Li
Recently, NiO x -based inverted planar perovskite solar cells (PSCs) have achieved great progress. However, the lattice mismatch between NiO x hole-transport layers (HTLs) and perovskite active layers will result in interfacial defect formation, which severely influences device efficiency and stability. In this work, this is alleviated by coating of polyethylenimine cations (PEI•HI) on the surface of NiO x HTLs. The introduction of PEI•HI can not only effectively passivate the surface defects of NiO x films, but also induce the in-situ-generation of polyethylenimine (PEI)-based two-dimensional (2D) perovskite interlayers between NiO x and CH 3 NH 3 PbI 3 (MAPbI 3 ). Such PEI-based 2D perovskite interlayer can dramatically mitigate the lattice mismatch between NiO x and perovskites to suppress the interfacial defects formations and promote the high-quality crystal nucleation and growth of above perovskite films. Meanwhile, it is demonstrated that the molecular weights of PEI act the pivotal part in controlling the nucleation quality of perovskites. When employing PEI with molecular weight of 10,000 (PEI-1000), the high-crystalline perovskite film with large-sized grains and reduced interfacial defects is obtained and the champion PSC delivers a power conversion efficiency (PCE) of 19.23% with weak hysteresis effect and improved reproducibility and stability. Our work provides a promising approach to improve the lattice match between NiO x and perovskites for high-performance NiO x -based inverted planar PSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Nian Cheng,Weiwei Li,Zhenhua Yu,Changlei Wang,Fei Qi,Pei Liu,Yuqing Xiao,Xing-Zhong Zhao
It is a great challenge to prepare high quality perovskite films in ambient atmosphere with high humidity (≥ 50%), since the commonly adopted two step sequential deposition process produces perovskite films with rough surfaces and a large amount of residual PbI 2 . To solve these problems, a facile method using combined solvent and vapor treatment is proposed. The residual PbI 2 is diminished through a solvent treatment process, and then smooth perovskite surface with micrometer scaled perovskite particles is obtained with a CH 3 NH 2 vapor treatment. The quality of the obtained perovskite films is examined in the hole transport material free perovskite solar cells, and power conversion efficiency is boosted up by 17.3% compared with the traditional method. When a CuPc hole transport layer is further introduced, carbon counter electrode based perovskite solar cells exhibit a superior power conversion efficiency of 16.61%. Thus this method shows great potential in further optimizing the performance of perovskite solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Mingzhu Su,Zitong Feng,Zheng Feng,Hanxiao Chen,Xingyun Liu,Jian Wen,Hongri Liu
Sb 2 S 3 has been proven to be a very promising light absorbing material for photovoltaic applications due to its low cost, high stability, non-toxicity, and abundant elemental storage. Electron transport layer (ETL) is a very crucial factor to the performances of Sb 2 S 3 solar cells. Here we developed a simple chemical solution process method to synthesize SnO 2 colloidal and fabricated SnO 2 ETL at low-temperature first, and then SnO 2 /CdS double ETL was prepared by combining SnO 2 and CdS. The power conversion efficiency of Sb 2 S 3 solar cell is 5.3% based on the SnO 2 /CdS double ETL, whereas the device based on CdS ETL only exhibites a PCE of 4.3%. Experimental analyses revealed that the introduction of SnO 2 ETL enhanced the grain size of Sb 2 S 3 films and passivated interfacial defects thus enhancing device efficiency. Our results show the potential application of SnO 2 in the planar Sb 2 S 3 solar cell.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yiqian Cui,Yuchen Xiong,Jiawen Wang,Yu Zhang,Wei Yu
The formation of ohmic contact between the carrier transport layer and the electrode is necessary for the high-performance solar cells. However, in the PEDOT: PSS/Si hybrid solar cells, the low conductivity of PEDOT: PSS and the high contact barrier between PEDOT: PSS and Ag electrodes result in high contact resistance, which inhibits the improvement of cell efficiency. In this work, the above two issues were improved simultaneously by simply introducing a MoO X interface layer between PEDOT: PSS and Ag electrodes. The detailed characterization and analytical results show that the quinoid structure of PEDOT: PSS films and the Mo 5 + with metallization electricity properties increased significantly due to the interaction between PEDOT: PSS and MoO X , reducing the resistivity of PEDOT: PSS. At the same time, the contact potential barrier was reduced due to the formation of MoO X /Ag composite electrodes with high work function (WF). In addition, the PEDOT: PSS/MoO X films with higher WF led to a higher built-in electric field. Due to these collaborative improvements, a PEDOT: PSS/Si solar cell with a high power conversion efficiency (PCE) of 15.02 % was achieved. This work provides a new idea to modify the interface between PEDOT: PSS and Ag electrodes for improving the PCE of PEDOT: PSS/Si hybrid solar cells.
研究领域:
材料科学
·
能源技术
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Haixuan Yu,Zhiguo Zhang,Huaxia Ban,Xiongjie Li,Zhirong Liu,Junyi Huang,Wanpeng Yang,Yan Shen,Mingkui Wang
The lead-free inorganic perovskite CsSnI 3 is considered as one of the best candidates for emerging photovoltaics. Nevertheless, CsSnI 3 -based perovskite solar cells experience a significant drop in performance due to the nonradiative recombination facilitated by trapping. Here, we show an electron donor passivation method to regulate deep-level defects for CsSnI 3 perovskite with electron donor pyrrole. Experimental observations combined with theoretical simulations verify that the saturation of Tin dangling bonds with pyrrole on the CsSnI 3 surface via a Lewis acid-base addition reaction can significantly reduce the density of deep-level defects. Consequently, the printable mesoporous perovskite solar cells with an FTO/compact-TiO 2 /mesoporous-TiO 2 /Al 2 O 3 /NiO/carbon framework device structure penetrated with CsSnI 3 achieve a power conversion efficiency of up to 10.11%. To our knowledge, this represents the highest efficiency reported to date for lead-free perovskite-based printable mesoporous solar cells. Furthermore, the unencapsulated devices demonstrated remarkable long-term stability, retaining 92% of their initial efficiency even after 2400 h of aging in a nitrogen atmosphere.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Dan Liu,Yuxiao Guo,Yawei Yang,Jie Liu,Xingtian Yin,Wenxiu Que
The organic-inorganic halide perovskite (OIHP) materials are becoming promising, but there is still inherent defect-mediated-carrier recombination in hybrid perovskite materials, thus, leading to inefficient power conversion efficiency (PCE). The defect states, which act as the recombination centers, are usually formed during crystallization process . Here, by a hot injection method, Na 2 S ligand exchange is applied to synthesize copper indium selenium quantum dots (CuInSe 2 QDs), which are well dispersed in N,N-dimethylformamide (DMF) and then added into perovskite precursor solution. The resulted QD-in-perovskite structure is found to be beneficial for enlarging grain size, and thus exhibits an improved crystallinity and absorption due to the passivation of trap states. Hence, the perovskite solar cell (PSC) based on the MAPbI 3 -CuInSe 2 QD hybrid film show an improved carrier lifetime from 58.17 ns to 243.23 ns and an enhanced PCE from 16.3% to 18.4% due to higher open-circuit voltage, compared to the cell device based on the pure perovskite film. Additionally, the optimized cell device presents better stability, which can still keep 75% of the initial PCE after 20-day storage. Such a simple Na 2 S ligand exchange to introduce QD into perovskite provides strong potential for preparing other hybrid materials .
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 RRL
·
2022
·Vol. 6
·期 11
·2200672
·
IF 9.173
Mingyuan Sun,Mingyu Ma,Yang Guo,Songyang Yuan,Hui Xiong,Ziyu Tan,Wenzhe Li,Jiandong Fan,Zhijun Ning
Despite tin perovskite showing excellent optoelectronic properties such as ideal bandgap and high carrier mobility, the intrinsic instability of tin perovskite due to the reaction with water and oxygen that significantly shadows its application. Herein, a molecule substituted with two fluorine atoms for the construction of low-dimensional tin perovskite is explored. Tin perovskite film based on this molecule shows much enhanced hydrophobicity, bringing much enhanced stability in atmosphere. The unencapsulated device can be kept over 200 h in atmospheric environment. In comparison to the instantaneous degradation of device performance for traditional 3D solar cells, no obvious degradation of device efficiency is observed under continuous operation in atmosphere without encapsulation over 10 h. Furthermore, the low-dimensional perovskite film exhibits a unique two-layer structure that can effectively passivate defects of the tin perovskite film. Accordingly, the power conversion efficiency (PCE) of Sn-perovskite solar cells realizes a remarkable enhancement by a factor of 45% and yields a PCE of 8.38%. This work indicates that molecular design of low-dimensional structure is a promising approach to improve the stability of tin perovskite.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 40
·14066-14074
·
IF 7.059
Yuxiang Wang,Xinan Shi,Gang Wang,Junye Tong,Daocheng Pan
Recently, the binary BiI3 semiconductor has emerged as a novel and potential absorbing material for thin film solar cells. In this work, high-quality BiI3 thin films are obtained by a two-step method via iodization of BiSI precursor thin films at low temperatures. The BiSI precursor solution is made via a Bi(OH)3/I2/butylamine/CS2 method. After the iodization process, the BiSI thin film transforms into a large-grain BiI3 absorber layer. The grain size of the BiI3 thin film is more than 1 μm, which leads to a low density of defects. It is worth-noticing that all of the procedures are conducted in open air. The temperature and duration of the iodization process are systematically investigated. By selecting V2O5 and ZnO as a hole extraction layer and an electron transport layer, an all-inorganic BiI3 thin film solar cell with a structure of ITO/V2O5/BiI3/ZnO/Ag is fabricated, yielding a power conversion efficiency of 1.33%, along with an open-circuit voltage of 601 mV, a short-circuit current density of 5.57 mA cm−2 and a fill factor of 39.87%. The un-encapsulated device shows excellent stability, and the performance decreases by only 8.1% after 100 days of storage in dry air.
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
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
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-13
·
IF 16.419
Jin Xin,Yang Lin,Wang Xiao-Feng
Two-dimensional (2D) perovskites solar cells (PSCs) have attracted considerable attention owing to their excellent stability against humidity; however, some imperfectness of 2D perovskites, such as poor crystallinity, disordered orientation, and inferior charge transport still limit the power conversion efficiency (PCE) of 2D PSCs. In this work, 2D Ti 3 C 2 T x MXene nanosheets with high electrical conductivity and mobility were employed as a nanosized additive to prepare 2D Ruddlesden–Popper perovskite films. The PCE of solar cells was increased from 13.69 (without additive) to 15.71% after incorporating the Ti 3 C 2 T x nanosheets with an optimized concentration. This improved performance is attributed to the enhanced crystallinity, orientation, and passivated trap states in the 3D phase that result in accelerated charge transfer process in vertical direction. More importantly, the unencapsulated cells exhibited excellent stability under ambient conditions with 55 ± 5% relative humidity.
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
危险品化学品经营许可证（带存储）