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采用Cs2CO3, 石墨烯(graphene):Cs2CO3混合材料和 ZnO 纳米颗粒作为阴极修饰材料, 研究了不同阴极界面修饰层对基于SubPc/C60的倒置结构的有机太阳能电池性能的影响. 结果表明: 引入适当厚度的阴极修饰层, 可以提高器件的性能和稳定性; 尤其是基于Cs2CO3以及graphene:Cs2CO3混合阴极修饰层的光伏器件, 能量转换效率(PCE)提高了2倍; 同时, 采用ZnO纳米颗粒作为阴极修饰层的器件, 开路电压(VOC)达到0.89 V, 并且器件的PCE 提高了4倍多. 此外, 不同电极修饰材料和倒置结构的引入可以有效防止器件串连电阻的升高, 从而提高器件的稳定性.Organic solar cell (OSC) with an inverted structure based on subphthalocyanine (SubPc)/C60 is fabricated by using Cs2CO3, graphene:Cs2CO3 mixed system and ZnO nanoparticles as cathode modifying materials, and its influences on the performance and stability of OSC are investigated. The results show that the OSC with an appropriate thickness of cathode modifying layer exhibits higher performance and it is more stable than those unmodified ones. The power conversion efficiency (PCE) of the Cs2CO3 and graphene:Cs2CO3 mixed material modified device is enhanced by a factor of two. Meanwhile, the ZnO nanoparticle modified device shows a highest open-circuit voltage (VOC) of 0.89 V, and the PCE increases more than 4 times. Besides, the adoptions of different cathode modifying materials and the inverted structures can effectively prevent the series resistance of the device from increasing, thereby improving the stability of the device.
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Keywords:
- inverted type /
- cathode modifying layer /
- organic solar cell /
- stability
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[1] Tang C W 1986 Appl. Phys. Lett. 48 183
[2] Sun Y M, Welch G C, Leong W L, Takacs C J, Bazan G C, Heeger A J 2012 Nat. Mater. 11 44
[3] Dou L T, Gao J, Richard E, You J B, Li G, Yang Y 2012 J. Am. Chem. Soc. 134 10071
[4] Li X H, Choy W C H, Huo L H, You J, Yang Y 2012 Adv. Mater. 24 3046
[5] Gilot J, Wienk M M, Janssen R A J 2010 Adv. Funct. Mater. 20 3904
[6] Subbiah J, Amb C M, Irfan I, Gao Y L, Reynolds J R, So F 2012 ACS Appl. Mater. Interfaces 4 866
[7] Liu R, Xu Z, Zhao S L, Zhang F J, Cao X N, Kong C, Cao W Z, Gong W 2011 Acta Phys. Sin. 60 058801 (in Chinese) [刘瑞, 徐征, 赵谡玲, 张福俊, 曹晓宁, 孔超, 曹文喆, 龚伟 2011 60 058801]
[8] Dou L, You J, Li G, Yang Y 2012 Nat. Photon. 6 180
[9] Sun Y, Gong X, Ben B Y H, Heeger A J 2010 Appl. Phys. Lett. 97 193310
[10] Gao Y, Yip H L, Malley K M O, Cho1 N C, Chen H Z, Jen A K Y 2010 Appl. Phys. Lett. 97 203306
[11] Liao H H, Chen L M, Xu Z, Li G, Yang Y 2008 Appl. Phys. Lett. 92 173303
[12] Scharber M C, Mhlbacher D, Koppe M, Denk P, Waldauf C, Heeger A J, Brabec C J 2006 Adv. Mater. 18 789
[13] Chu C W, Shrotriya V, Li G, Yang Y 2006 Appl. Phys. Lett. 88 153504
[14] Li R H, Meng W M, Peng Y Q, Ma C Z, Wang R S, Xie H W, Wang Y, Ye Z C 2010 Acta Phys. Sin. 59 2126 (in Chinese) [李荣华, 孟卫民, 彭应全, 马朝柱, 汪润生, 谢宏伟, 王颖, 叶早晨2010 59 2126]
[15] Yu J S, Wang N N, Zang Y, Jiang Y D 2011 Sol. Energ. Mat. Sol. C 95 664
[16] Yu J S, Huang J, Zhang L, Jiang Y D 2009 J. Appl. Phys. 106 063103
[17] Wang N N, Yu J S, Lin H, Jiang Y D 2010 Chin. J. Chem. Phys. 23 84
[18] Servaites J D, Yeganeh S, Marks T J, Ratner M A 2010 Adv. Funct. Mater. 20 97
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