SYNTHETIC METALS
·
2015
·
IF 2.252
Yin Yu,Bo Jin,Rufang Peng,Lisheng Fan,Longhua Cai,Bin Fan,Shijin Chu
A series of [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) analogs with different ester structures, such as isopropyl ester (F 1 ), sec-butyl ester (F 2 ), ethyl ester (F 3 ), 2-thiopheneethyl ester (F 4 ), phenethyl ester (F 5 ), and 4-methoxyphenethyl ester (F 6 ), were designed, synthesized, and evaluated for their photovoltaic performance. The optical, electrochemical, morphological, and photovoltaic properties of the molecules were characterized through UV–vis spectroscopy, cyclic voltammetry, and atomic force microscopy; then, the effects of different ester structures on these properties were investigated. Results showed that polymer solar cells (PSCs) with P3HT as a donor and F 1 –F 6 as acceptors displayed different photovoltaic properties. The PSCs with F 1 , F 2 , and F 3 as acceptors showed higher photovoltaic performance than those with F 4 , F 5 and F 6 as acceptors. Moreover, the power conversion efficiency of the former three PSCs exceeded or approached 3.0%, whereas that of the latter three PSCs was below 2.0%. Compared with PCBM, F 2 and F 3 with an aliphatic ester exhibited a slightly better photovoltaic performance, F 1 with isopropyl ester displayed similar photovoltaic properties, and other aromatic ring ester PCBM-like derivatives showed poorer photovoltaic performance.
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 12
·4169-4180
·
IF 7.059
Chunli Hou,Huangzhong Yu
Two-dimensional (2D) transition metal carbides, MXenes, typically represented by Ti3C2TX, have shown great promise in optoelectronic devices due to their metallic electrical conductivity, large surface area, superior hydrophilicity and excellent transparency. Herein, to improve the conductivity of polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films, we incorporate solution-processable 2D Ti3C2TX nanosheets into PEDOT:PSS to fabricate PEDOT:PSS/Ti3C2TX composite layers, and polymer solar cells (PSCs) with PEDOT:PSS/Ti3C2TX composite films as hole transport layers (HTLs) are fabricated for the first time. The nanostructures and the corresponding hole injection properties of PEDOT:PSS/Ti3C2TX composite layers are systematically evaluated. Based on the non-fullerene PBDB-T:ITIC system, a power conversion efficiency (PCE) of 11.02% is obtained for the device with PEDOT:PSS/Ti3C2TX as the HTL, which is improved by 13.5% compared to that of the control device with pure PEDOT:PSS as the HTL (9.72%). When using the PM6:Y6 system as the active layer, the PCE of the device based on PEDOT:PSS/Ti3C2TX is improved to 14.55% from 13.10% for the PEDOT:PSS reference device. 2D Ti3C2TX nanoflakes with higher conductivity construct additional charge transfer pathways between the PEDOT nanocrystals and induce conformational transition of PEDOT from a coil to a linear/expanded-coil structure, leading to an improvement in conductivity and device performance. Interestingly, PEDOT:PSS/Ti3C2TX based devices also exhibit enhanced long-term stability compared to PEDOT:PSS based devices. These results show that PEDOT:PSS/Ti3C2TX composite films have a promising prospect in high efficiency organic optoelectronics.
研究领域:
材料科学
·
光电材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 10
·2058
·
IF 4.967
Chaoyue Zhao,Hui Huang,Lihong Wang,Guoping Zhang,Guanyu Lu,Han Yu,Guanghao Lu,Yulai Han,Mingxia Qiu,Shunpu Li,Guangye Zhang
In this work, we apply the sequential processing (SqP) method to address the relatively low electron mobility in recent all-polymer solar cells (all-PSCs) based on the polymerized small-molecule acceptor (PSMA). Compared to the blend-casting (BC) method, all-PSCs composed of PM6/PY-IT via the SqP method show boosted electron mobility and a more balanced charge carrier transport, which increases the FF of the SqP device and compensates for the short-circuit current loss, rendering comparable overall performance with the BC device. Through film-depth-dependent light absorption spectroscopy, we analyze the sub-layer absorption and exciton generation rate in the vertical direction of the device, and discuss the effect of the increased electron mobility on device performance, accordingly.Keywords:all-polymer solar cells;sequential processing;polymerized small-molecule acceptors
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qiancheng Shang,Junsheng Yu,Rong Hu,Zixiong Liu,Jiang Cheng,Ying Li,Xuxia Shai,Ming-ming Huo,Xin Yang,Lu Li
In this study, a novel metal oxide, lanthanum nickelate (LNO) with a perovskite structure, was introduced into a polymer solar cell (PSC) device, replacing the PEDOT:PSS hole transport layer (HTL). The results show that the LNO-based PTB7-Th:PC71BM solar cell exhibits a higher circuit current density, power conversion efficiency, and stability compared with a device with PEDOT:PSS HTL. To understand the effect of LNO HTL on the performance of devices, the active layer morphology and charge transport characteristics in PSCs were systematically analyzed. The morphology of active layer was affected by the HTL, which further regulated the generation and transport processes of charge carrier in the PSC device. For the LNO HTL, an appropriate thickness (8 nm) and a small surface roughness (Sq = 0.7 nm) can coordinate the energy-level structure of device and improve the interface contact between the FTO electrode and PTB7-Th:PC71BM active layer, promoting the charge transport performance of device. Therefore, this work provides a new consideration for the preparation of efficient, stable, and low-cost polymer solar cells.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2012
·
IF 1.829
Xiaoyan Du,Dan He,Zuo Xiao,Liming Ding
Inverted polymer solar cells with a configuration of ITO/ZnO/PBDTTT-C:PC 71 BM/MoO 3 /Ag were fabricated and a power conversion efficiency of 6.64% was achieved under AM 1.5G irradiation (89 mW/cm 2 ). The function of UV light was systematically investigated by tracking the changes of the device performance for 212 min under continuous illumination with or without UV light. We found that UV light plays a decisive role not only in the photo-annealing step, leading to a remarkable increase of PCE by increasing ZnO conductance, but also in the photo-bleaching step, causing slow degradation of solar cells through photo-oxidation of the conjugated polymer.
研究领域:
材料科学
·
光伏技术
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
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
ACTA PHYSICO-CHIMICA SINICA
·
2015
·Vol. 31
·期 7
·1413-1420
·
IF 0.852
WU Na,LUO Qun,WU Zhen-Wu,MA Chang-Qi
The high-temperature thermal stability of solution-processed polymer solar cells is a key issue that determines the feasibility of further thermal encapsulation processes, such as thermal lamination or hightemperature atomic layer deposition. In this article, polymer solar cells with
poly(3, 4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) or MoO3 as the anode buffer layer (ABL) and ZnO or LiF as the cathode buffer layer (CBL) were fabricated with a device structure of indium tin oxide (ITO)/ABL/poly(3-hexylthiophene): phenyl- C61- butyric
acid methyl ester (P3HT:PC61BM)/CBL/Al. Device performances, especially the hightemperature thermal stability of the devices, were studied in detail. The results indicated that the thermal stability of the organic solar cells was highly dependent on the buffer layer material. Devices
with MoO3 as ABL and ZnO as CBL showed high thermal stability at a temperature of 120-150 , which ensures the possibility of subsequent thermal processing. In addition, the use of ZnO as the cathode buffer layer could also improve longterm device stability.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Chunli Hou,Huangzhong Yu,Chengwen Huang
The optimized electron transport layer (ETL) plays a crucial role in the practical application of polymer solar cells (PSCs). Herein, bio-inspired polydopamine (PDA) modified Ti 3 C 2 T x (PDA-Ti 3 C 2 T x ) as a multifunctional additive is dispersed into ZnO to fabricate ZnO:PDA-Ti 3 C 2 T x composite ETL. PDA-Ti 3 C 2 T x passivates the trap states of ZnO via forming strong and stable chelate interactions through Zn 2+ ions and PDA molecules. PDA-Ti 3 C 2 T x also lowers the vacuum level of transport layer by forming interface dipoles between catechol of PDA and Zn 2+ ions of zinc oxide. Moreover, PDA-Ti 3 C 2 T x constructs additional electron transport pathways by connecting the discontinuities among ZnO nanocrystals . As such, ZnO:PDA-Ti 3 C 2 T x composite ETL, with higher conductivity and proper work function, can effectively collect electrons in the PSCs. Compared with ZnO control devices, the performance of PSCs with ZnO:PDA-Ti 3 C 2 T x ETL is obviously enhanced with power conversion efficiencies (PCEs) from 10.34% to 12.07% based on PBDB-T:ITIC, 14.84–16.69% based on PM6:Y6, and 8.14–9.41% for PTB7:PC 71 BM, respectively. The ambient stability of the PSCs with ZnO:PDA-Ti 3 C 2 T x ETLs is significantly improved due to the increased hydrophobicity of ETL and the enhanced crystallinity of active layer. The novel ETLs provide a facile, eco-friendly, low-cost approach to realize the highly performance and stable PSCs.
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
JOURNAL OF MATERIALS RESEARCH
·
2019
·Vol. 34
·期 12
·2057-2066
·
IF 1.982
Mingjing Zhang,Xiaofang Zhang,Pengzhi Guo,Jie Lv,Xunchang Wang,Junfeng Tong,Yangjun Xia
Two wide band gap conjugated polymers, namely PBDT-TT25 and PBDT-TT36, derived from (4,8-bis(4,5-dioctyl-thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl)bis(trimethylstannane) with 2,5-dibromothieno[3,2-b]thiophene (TT25) or 3,6-dibromothieno[3,2-b]thiophene (TT36), have been synthesized by simply altering the linker positions of thieno[3,2-b]thiophene unit. The impact of linker positions on the energy levels, aggregation, active layer morphology, and optical and photovoltaic properties was evaluated systemically. We found that the absorption was greatly broadened, and the highest occupied molecular orbital (HOMO) energy level was elevated as the result of the significantly reduced twist angle on the polymer backbone when the linker positions changed from 3,6-isomer to 2,5-isomer. Therefore, the optimal inverted polymer solar cells exhibited a 1.87 times enhancement in power conversion efficiencies (PCE), which was mainly ascribed to the higher short circuit current densities (JSC) and fill factor (FF) of the devices mainly benefited from the widened, stronger absorption, higher hole mobility, and more ordered structure.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 3
·331
·
IF 2.935
Xunchang Wang,Chang Cheng,Yuda Li,Feng Wang
Two new low bandgap conjugated polymers, PBDTS-ID and PBDTS-DTNT, containing isoindigo (ID) and naphtho[1,2-c:5,6-c′]bis[1,2,5]thiadiazole (NT), respectively, as an electron-deficient unit and alkylthiothienyl-substituted benzodithiophene (BDTS) as an electron-rich unit, were designed and synthesized by palladium-catalyzed Stille polycondensation. Both polymers showed good thermal stability up to 330 °C and broad absorption ranging from 300 to 842 nm. Electrochemical measurement revealed that PBDTS-ID and PBDTS-DTNT exhibited relatively low-lying highest occupied molecular orbital energy levels at −5.40 and −5.24 eV, respectively. These features might be beneficial for obtaining reasonable high open-circuit voltage and high short-circuit current. Polymer solar cells (PSCs) were fabricated with an inverted structure of indium-tin oxide/poly(ethylenimine ethoxylate)/polymer:PC71BM/MoO3/Ag. As a preliminary result, the PSCs based on PBDTS-ID and PBDTS-DTNT exhibited moderate power conversion efficiencies of 2.70% and 2.71%, respectively.Keywords:conjugated polymers;polymer solar cells;inverted structure;power conversion efficiency
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Nano
·
2013
·
IF 12.062
Shuxuan Qu,Minghua Li,Lixin Xie,Xiao Huang,Jinguo Yang,Nan Wang,Shangfeng Yang
A new graphene–fullerene composite (rGO-pyrene-PCBM), in which [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) was attached onto reduced graphene oxide (rGO) via the noncovalent functionalization approach, was reported. The pyrene-PCBM moiety was synthesized via a facile esterification reaction, and pyrene was used as an anchoring bridge to link rGO and PCBM components. FTIR, UV–vis, and XPS spectroscopic characterizations were carried out to confirm the hybrid structure of rGO-pyrene-PCBM, and the composite formation is found to improve greatly the dispersity of rGO in DMF. The geometric configuration of rGO-pyrene-PCBM was studied by Raman, SEM, and AFM analyses, suggesting that the C60 moiety is far from the graphene sheet and is bridged with the graphene sheet via the pyrene anchor. Finally rGO-pyrene-PCBM was successfully applied as electron extraction layer for P3HT:PCBM bulk heterojunction polymer solar cell (BHJ-PSC) devices, affording a PCE of 3.89%, which is enhanced by ca. 15% compared to that of the reference device without electron extraction layer (3.39%). Contrarily, the comparative devices incorporating the rGO or pyrene-PCBM component as electron extraction layer showed dramatically decreased PCE, indicating the importance of composite formation between rGO and pyrene-PCBM components for its electron extraction property.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Zhao Xin,Li Meng,Jiang Linping,Tang Hua,Guan Youwei
Silver nanowire films are good candidates to be used as transparent conductive films that could be widely utilized in organic photoelectronic devices such as polymer solar cells. However, their application is usually limited, as they are mainly used as top electrode materials; otherwise, they would be prone to complex transferring processes. In this study, we successfully prepared device-level ZnO-covered silver nanowire (AgNWs/ZnO) films. ZnO was prepared by a spray pyrolysis method using zinc-ammonia solution at a relatively low temperature (95°C). The films showed good adhesive properties to the glass substrate, considering it withstood the process of applying polyimide tapes on the surface and tearing them off more than 100 times. It also exhibited good conductivity (∼24 Ω/sq) with high transmittance in the visible range (>80%). After a simple polish and patterning, AgNWs/ZnO showed a good performance as a sub-electrode for polymer solar cells. The PM6:Y6 devices achieved a high power conversion efficiency of 8.37% with an open-circuit voltage of 0.81 V, a short-circuit current density of 18.18 mA/cm2, and a yield of 81.25%. This indicates that the technology has a good prospect of large-scale fabrication of organic photoelectronic devices.
研究领域:
材料科学
·
光电子器件
✓ 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）