1. 含硼氮配位鍵的高分子電子受體材料

高分子太陽能電池常用電子受體材料是富勒烯衍生物PCBM，富勒烯衍生物對(duì)太陽光的吸收能力差，且生產(chǎn)能耗大，成本高，因此需要開發(fā)非富勒烯的電子受體材料。用高分子作為電子受體材料，不但具有太陽光吸收能力強(qiáng)，成本低的優(yōu)點(diǎn)，而且可以大幅度提高形貌穩(wěn)定性和機(jī)械性能。但是高分子電子受體材料的種類和數(shù)量非常少，我們提出用硼氮配位鍵（B←N）設(shè)計(jì)高分子電子受體材料。發(fā)現(xiàn)硼氮配位鍵可以將常見高分子電子給體材料轉(zhuǎn)變?yōu)槭荏w材料，而且發(fā)展出基于硼氮配位鍵的新型拉電子單元，用于構(gòu)建高分子電子受體材料。該工作為受體材料的設(shè)計(jì)提供學(xué)術(shù)新思想和材料新體系。

2. 溶液加工型石墨烯電極界面材料

高分子太陽能電池活性層與電極之間的界面性質(zhì)對(duì)于器件性能非常重要，開發(fā)電極界面材料是實(shí)現(xiàn)高性能器件的有效方法。我們發(fā)展出溶液加工型石墨烯電極界面材料，包括氧化石墨烯體系和石墨烯量子點(diǎn)體系。利用溶液加工型石墨烯化學(xué)結(jié)構(gòu)易修飾、性質(zhì)易調(diào)控的特點(diǎn)，我們進(jìn)行了系統(tǒng)研究，實(shí)現(xiàn)了溶液加工型石墨烯能級(jí)結(jié)構(gòu)、導(dǎo)電率、成膜性等多方面性質(zhì)的大幅度協(xié)同調(diào)控，提升了器件性能。

3. 單一高分子白光材料

白光高分子發(fā)光材料與器件在全色顯示、背光源、照明領(lǐng)域巨大的應(yīng)用前景。白光是混合光，需要發(fā)光光譜有效覆蓋整個(gè)可見光區(qū)。普通有機(jī)/高分子發(fā)光材料的發(fā)光光譜半峰寬小，無法覆蓋整個(gè)可見光區(qū)，無法實(shí)現(xiàn)白光發(fā)射。我們?cè)趪�際上提出并實(shí)現(xiàn)了單一高分子的三基色同時(shí)發(fā)光并得到白光，解決了白光高分子材料與器件光譜穩(wěn)定性的難題，為發(fā)展單一高分子白光材料和帶動(dòng)全色顯示應(yīng)用拓展出新方向。

建課題組后：

18.Z. C. Ding, X. J. Long, C. D. Dou*, J. Liu*, L. X. Wang, A Polymer Acceptor with an Optimal LUMO Energy Level for All-Polymer Solar Cells, Chem. Sci., 2016, DOI: 10.1039/C6SC01756H.

17. S. Zhang, Z. J. Zhang, J. Liu*, L. X. Wang, Fullerene Adducts Bearing Cyano Moiety for Both High Dielectric Constant and Good Active Layer Morphology of Organic Photovoltaics, Adv. Funct. Mater., 2016, DOI: 10.1002/adfm.201600350.

16. X. X. Chen, Z. J. Zhang, Z. C. Ding, J. Liu*, L. X. Wang*, Diketopyrrolopyrrole-Based Conjugated Polymers Bearing Branched Oligo(Ethylene Glycol) Side Chains, Angew. Chem. Int. Ed., 2016, DOI: 10.1002/anie.201602775. （封面）

15. X. J. Long, Z. C. Ding, C. D. Dou*, Z. Y. Xie, J. Liu*, L. X. Wang, Polymer Acceptor Based on Double B←N Bridged Bipyridine (BNBP) Unit for High-Efficiency All-Polymer Solar Cells. Adv. Mater., 2016, DOI: 10.1002/adma.201601205.

14. L. Zhang, Z. S. Miao, Z. Hao, J. Liu*, Exfoliating and Dispersing Few-Layered Graphene in Low-Boiling-Point Organic Solvents Towards Solution-Processed Opto-Electronic Device Application, Chem. Asian J., 2016, 11, 1441.

13. R. Y. Zhao, C. D. Dou*, Z. Y. Xie, J. Liu*, L. X. Wang, Polymer Acceptor Based on B←N Units with Enhanced Electron Mobility for Efficient All-Polymer Solar Cells, Angew. Chem. Int. Ed., 2016, 55, 5313.

12. B. Meng, Z. Y. Xie, J. Liu*, L. X. Wang*, A Bromo-Functionalized Conjugated Polymer as Cross-linkable Anode Interlayer of Polymer Solar Cells, Chem. Asian J., 2016, 11, 1218.

11. C. D. Dou, X. J. Long, Z. C. Ding, Z. Y. Xie, J. Liu* L. X. Wang, An Electron-Deficient Building Block Based on the B←N Unit: An Electron Acceptor for All-Polymer Solar Cells, Angew. Chem. Int. Ed., 2016, 55, 1436.

10. B. Meng, Z. Y. Wang, W. Ma*, Z. Y. Xie, J. Liu*, L. X. Wang, A Cross-linkable Donor Polymer as the Underlying Layer to Tune the Active Layer Morphology of Polymer Solar Cells, Adv. Funct. Mater., 2016, 26, 226.

9. Z. J. Zhang, Z. C. Ding, C. D. Dou*, J. Liu*, L. X. Wang, Development of a Donor Polymer using a B←N Unit for Suitable LUMO/HOMO Energy Levels and Improved Photovoltaic Performance, Polym. Chem., 2015, 6, 8029.

8. B. Meng, H. Y. Song, X. X. Chen, Z. Y. Xie, J. Liu*, L. X. Wang*，Replacing Alkyl with Oligo(ethylene glycol) as Side Chains of Conjugated Polymers for Close pi-pi Stacking, Macromolecules，2015, 48, 4357.

7. Z. C. Ding, Z. Hao, B. Meng, Z. Y. Xie, J. Liu*, L. M. Dai*, Few-Layered Graphene Quantum Dots as Efficient Hole-Extraction Layer for High-Performance Polymer Solar Cells, Nano Energy, 2015, 15, 186.

6. C. D. Dou, Z. C. Ding, Z. J. Zhang, Z. Y. Xie, J. Liu*, L. X. Wang, Developing Conjugated Polymer with High Electron Affinity via Replacing a C-C Unit by a B←N Unit, Angew. Chem. Int. Ed., 2015, 54, 3648. (內(nèi)封面)

5. B. Meng, Y. Y. Fu, Z. Y. Xie, J. Liu*, L. X. Wang*, Phosphonated Conjugated Polymers for Polymer Solar Cells with Non-Halogenated Solvent Process, Polym. Chem., 2015, 26, 805.

4. B. Meng, Y. Y. Fu, Z. Y. Xie, J. Liu*, L. X. Wang*, Phosphonate-Functionalized Donor Polymer as an Underlying Interlayer to Improve Active Layer Morphology in Polymer Solar Cells, Macromolecules, 2014, 47, 6246.

3. L. Zhang, Z. J. Zhang, C. Z. He, L. M. Dai, J. Liu*, L. X. Wang, Rationally Designed Surfactants for Few-Layered Graphene Exfoliation: Ionic Groups Attached to Electron-Deficient pi-Conjugated Unit through Alkyl Spacers, ACS Nano, 2014, 8, 6663.

2. J. Liu, G. Kim, Y. H. Xue, J. Y. Kim, J.-B. Baek, M. Durstock, L. M. Dai*, Graphene Oxide Nanoribbon as Hole Extraction Layer to Enhance Efficiency and Stability of Polymer Solar Cells, Adv. Mater., 2014, 26, 786.

1. J. Liu*, M. Durstock, L. M. Dai*, Graphene Oxide Derivatives as Hole- and Electron-Extraction Layers for High-Performance Polymer Solar Cells, Energy Environ. Sci., 2014, 7, 1297.

建課題組前：

1. J. Liu, L. M. Dai*, et al., Hole and Electron Extraction Layers Based on Graphene Oxide Derivatives for High-Performance Bulk Heterojunction Solar Cells, Adv. Mater., 2012, 24, 2228.

2. J. Liu, L. M. Dai*, et al., Highly Crystalline and Low Bandgap Donor Polymers for Efficient Polymer Solar Cells, Adv. Mater., 2012, 24, 538.

3. J. Liu, L. M. Dai*, et al., Sulfated Graphene Oxide as a Hole-Extraction Layer in High-Performance Polymer Solar Cells, J. Phys. Chem. Lett., 2012, 3, 1928.

4. J. Liu, L. M. Dai*, et al., Graphene Materials for Energy-Related Application, MRS Bulletin, 2012, 37, 1265.

5. Y. H. Xue, J. Liu, L. M. Dai*, et al., Nitrogen-Doped Graphene Foams as Metal-Free Counter Electrodes in High-Performance Dye-Sensitized Solar Cells, Angew. Chem. Int. Ed., 2012, 51, 12124. (內(nèi)封面)

6. J. Liu, Q. B. Pei*, et al., Conjugated Polymer as Host for High Efficiency Blue and White Electrophosphorescence, Macromolecules, 2011, 44, 2451.

7. J. Liu, Q. B. Pei*, et al., Ambipolar Poly(meta-phenylene) Copolymer with High Triplet Energy as Host for Blue and Green Electrophosphorescence, J. Mater. Chem., 2011, 21, 9772.

8. J. Liu, Q. B. Pei*, et al., Poly(meta-phenylene): Conjugated Polymer Host with High Triplet Energy for Efficient Blue Electrophosphorescence, Macromolecules, 2010, 43, 9608.

9. J. Liu, Q. B. Pei*, et al., Electrophosphorescent Polymers for High- Efficiency Light-Emitting Diodes, Curr. Org. Chem., 2010, 14, 2133.

10. J. Liu, L. X. Wang*, et al., White Electroluminescence from a Star-Shaped Like Polymer with an Orange Emissive Core and Four Blue Emissive Arms, Adv. Mater., 2008, 20, 1357.

11. J. Liu, L. X. Wang*, et al., Novel White Electroluminescent Single Polymer Derived from Fluorene and Quinacridone, Macromolecules, 2008, 41, 1162.

12. J. Liu, L. X. Wang*, et al., Highly Efficient Red Electroluminescent Polymers with Dopant/Host System and Molecular Dispersion Feature: Polyfluorene as the Host and 2,1,3-Benzothiadiazole Derivative units as the Red Dopants, J. Mater. Chem., 2008, 18, 319.

13. J. Liu, L. X. Wang*, et al., Blue Electroluminescent Polymers with Dopant/Host System and Molecular Dispersion Feature: Polyfluorene as the Deep-blue Host and 1,8-Naphthalimide Derivative Units as the Light-blue Dopants, J. Mater. Chem., 2008, 18, 1659.

14. J. Liu, L. X. Wang*, et al., Molecular Design on Highly Efficient White Electroluminescence from a Single Polymer System with Simultaneous Blue, Green and Red Emission, Adv. Mater., 2007, 19, 531.

15. J. Liu, L. X. Wang*, et al., White Electroluminescence from a Single Polymer System: Improved Performance by Means of Enhanced Efficiency and Red-Shifted Luminescence of the Blue-Light-Emitting Species, Adv. Mater., 2007, 19, 1859.

16. J. Liu, L. X. Wang*, et al., Three-Color White Electroluminescence from a Single Polymer System with Blue, Green and Red Dopant Units as Individual Emissive Species and Polyfluorene as Individual Polymer Host, Adv. Mater., 2007, 19, 4224.

17. J. Liu, L. X. Wang*, et al., White Electroluminescence from a Single-Polymer Systemwith Simultaneous Two-Color Emission: Polyfluorene as Blue Hostand 2,1,3-Benzothiadiazole Derivatives as Orange Dopants on the Side Chain, Adv. Funct. Mater., 2007, 17, 1917.

18. J. Liu, L. X. Wang*, et al., Green Light-Emitting Polyfluorenes with Improved Color Purity Incorporated with 4,7-Diphenyl-2,1,3-Benzothiadiazole Moieties, J. Mater. Chem., 2007, 17, 2832.

19. J. Liu, L. X. Wang*, et al., White Electroluminescence from a Single Polymer System with Simultaneous Two Color Emission: Polyfluorene as Blue Host and 2,1,3-Benzothiadiazole Derivative Unit as Orange Dopant on the Main Chain, Adv. Funct. Mater., 2006, 16, 957. (封面)

20. J. Liu, L. X. Wang*, et al., Blue Light-Emitting Polymer with Polyfluorene as the Host and Highly Fluorescent 4-Dimethylamino-1,8-Naphthalimide as the Dopant in the Side Chain,Appl. Phys. Lett., 2006, 88, 083505.

21. J. Liu, L. X. Wang*, et al., Highly Efficient Green Light Emitting Polyfluorene Incorporated with 4-Diphenylamino-1,8-Naphthalimide as Green Dopant, J. Mater. Chem., 2006, 16, 1431.

22. J. Liu, L. X. Wang*, et al., The First Single Polymer with Simultaneous Blue, Green, and Red Emission for White Electroluminescence, Adv. Mater., 2005, 17, 2974.