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| 1 | Molecular design revitalizes the low-cost PTV-polymer for highly efficient organic solar cells显示文摘Developing photovoltaic materials with simple chemical structures and easy synthesis still remains a major challenge in the industrialization process of organic solar cells(OSCs).Herein,an ester substituted poly(thiophene vinylene)derivative,PTVT-T,was designed and synthesized in very few steps by adopting commercially available raw materials.The ester groups on the thiophene units enable PTVT-T to have a planar and stable conformation.Moreover,PTVT-T presents a wide absorption band and strong aggregation effect in solution,which are the key characteristics needed to realize high performance in non-fullerene-acceptor(NFA)-based OSCs.We then prepared OSCs by blending PTVT-T with three representative fullerene-and NF-based acceptors,PC71 BM,IT-4 F and BTP-e C9.It was found that PTVT-T can work well with all the acceptors,showing great potential to match new emerging NFAs.Particularly,a remarkable power conversion efficiency of 16.20%is achieved in a PTVT-T:BTP-e C9-based device,which is the highest value among the counterparts based on PTV derivatives.This work demonstrates that PTVT-T shows great potential for the future commercialization of OSCs. | Junzhen Ren Pengqing Bi Jianqi Zhang Jiao Liu Jingwen Wang Ye Xu Zhixiang Wei Shaoqing Zhang Jianhui Hou | 2021 | National Science Review2021，8，8： | 3 |
| 2 | Progress in Organic Solar Cells: Materials, Physics and Device Engineering显示文摘Organic solar cells(OSCs)have been developed for few decades since the preparation of the first photovoltaic device,and the record power conversion efficiency(PCE)certified by national renewable energy laboratory(NREL)has exceeded 17%.Looking back the whole history of OSCs,its rapid development is inseparable from multi-disciplinary efforts,including the new materials synthesizing,the device physics,and the device engineering,especially the breakthroughs in these disciplines.In this review,we are aiming at reviewing the history of the development of OSCs and summarizing the representative breakthroughs. | Pengqing Bi Shaoqing Zhang Jingwen Wang Junzhen Ren Jianhui Hou | 2021 | Chinese Journal of Chemistry2021，39，9： | 2 |
| 3 | Suppressing trap states and energy loss by optimizing vertical phase distribution through ternary strategy in organic solar cells显示文摘Suppressing the trap-state density and the energy loss via ternary strategy was demonstrated.Favorable vertical phase distribution with donors(acceptors)accumulated(depleted)at the interface of active layer and charge extraction layer can be obtained by introducing appropriate amount of polymer acceptor N2200 into the systems of PBDB-T:IT-M and PBDB-TF:Y6.In addition,N2200 is gradiently distributed in the vertical direction in the ternary blend film.Various measurements were carried out to study the effects of N2200 on the binary systems.It was found that the optimized morphology especially in vertical direction can significantly decrease the trap state density of the binary blend films,which is beneficial for the charge transport and collection.All these features enable an obvious decrease in charge recombination in both PBDB-T:IT-M and PBDB-TF:Y6 based organic solar cells(OSCs),and power conversion efficiencies(PCEs)of 12.5%and 16.42%were obtained for the ternary OSCs,respectively.This work indicates that it is an effective method to suppress the trap state density and thus improve the device performance through ternary strategy. | Pengqing Bi Shaoqing Zhang Tong Xiao Minghuan Cui Zhihao Chen Junzhen Ren Chaochao Qin Guanghao Lu Xiaotao Hao Jianhui Hou | 2021 | Science China Chemistry2021，64，4： | 1 |
| 4 | Isolation and Identification of Highly Pathogenic PRRSV from a Pig Farm显示文摘[Objective] To identify suspected cases of highly pathogenic PRRSV from a pig farm. [Method] The suspected cases of highly pathogenic PRRSV were conducted pathologic anatomy, the gene of PRRSV N protein was amplified by RT-PCR and its sequences were determined and analyzed. [Result] The nucleotide sequence of N protein of N7/N8 isolate shared the consistency of 97.0% with highly pathogenic strains(JXA1, Hu N4, SX-1 and TJ), and that of isolate N9 shared the consistency of 97.3% with highly pathogenic strains, indicating the infected virus in the pig farm was highly pathogenic PRRSV. [Conclusion] This research provides a reference for the diagnosis of highly pathogenic PRRSV infec-tion in swine production. | Ren Sufang Guo Lihui Gao Shuxia Zhang Zhaokun Liu Junzhen Wu Jiaqiang Zhang Yuyu | 2018 | Animal Husbandry and Feed Science2018，10，3： | 0 |
| 5 | Fluorination strategy enables greatly improved performance for organic solar cells based on polythiophene derivatives显示文摘The power conversion efficiencies(PCEs)of organic solar cells(OSCs)have reached 18%recently,which have already met the demand of practical application.However,these outstanding results were generally achieved with donor-acceptor(D-A)type copolymer donors,which can hardly fulfill the low-cost largescale production due to their complicated synthesis processes.Therefore,developing polymer donors with simple chemical structures is urgent for realizing low-cost OSCs.Polythiophene(PT)derivatives are currently regarded as promising candidates for such kind of donor materials,which has been illustrated in many works.In this work,two new alkylthio substituted PT derivatives,P301 and P302,were synthesized and tested as donors in the OSCs using Y5 as the accepto r.In comparison,the introduction of fluorine atoms on the backbone of P302 can not only downshift the energy levels,but also greatly improve the phase separation morphologies of the active layers,which is ascribed to the enhanced aggregation effect and the reduced miscibility with the non-fullerene acceptor.As a result,the P302:Y5-based OSC exhibits a significantly improved PCE of 9.65%than that of P301:Y5-based one,indicating the important role of fluorination in the construction of efficient PT derivative donors. | Chenyi Yang Shaoqing Zhang Junzhen Ren Pengqing Bi Xiaotao Yuan Jianhui Hou | 2021 | Chinese Chemical Letters2021，32，7： | 0 |
| 6 | Reduced energetic disorder enables over 14%efficiency in organic solar cells based on completely non-fused-ring donors and acceptors显示文摘The large energetic disorder has been regarded as a limitation for the further advance of organic solar cells(OSCs).The intramolecular energetic disorder,which originates from the molecular conformational diversity,is quite different for various non-fused-ring materials and of great importance for the corresponding device performance.In this work,the 2-ethylhexyl on A4T-16,an efficient completely non-fused-ring acceptor,is replaced with the 3-ethylheptyl to obtain a novel acceptor of A4T-3.The out-shifted branching position of 3-ethylheptyl reduces the steric hindrance effect,endowing A4T-3 with a more coplanar structure.As a result,A4T-3 exhibits a lower intramolecular energetic disorder than A4T-16,leading to a more uniform surface-electrostatic potential(ESP)distribution.Therefore,A4T-3 exhibits a smaller barrier for intramolecular electron transport and a higher electron mobility.Meanwhile,the lower ESP endows A4T-3 with reduced non-radiative energy loss when blending with the donor.When using PTVT-T as the donor,the A4T-3-based OSC exhibited comprehensively improved photovoltaic properties in comparison with the A4T-16-based one,delivering a high power conversion efficiency(PCE)of 14.26%.Notably,this is the first report of OSCs where both the donor and the acceptor are completely non-fused-ring materials.According to the material-only cost(MOC)evaluation,the cost of PTVT-T:A4T-3-based device is much lower than that of other high-performance OSCs,revealing the great potential of completely non-fused-ring photoactive materials for application-oriented OSCs. | Chenyi Yang Lijiao Ma Ye Xu Junzhen Ren Jianhui Hou Shaoqing Zhang | 2022 | Science China Chemistry2022，65，12： | 0 |
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