Dou Letian, You Jingbi, Yang Jun, et al. Tandem polymer solar cells featuring a spectrally matched low-bandgap polymer [J]. Nature Photonics, 2012, 6(3):180-185.[2] Liang Yongye, Xu Zheng, Xia Jiangbin, et al. For the bright future-bulk heterojunction polymer solar cells with power conversion efficiency of 7.4% [J]. Adv. Mater., 2010, 22(20):E135-E138.[3] Li G, Shrotriya V, Huang J S , et al. High-efficiency solution processable polymer photovoltaic cells by self-organization of polymer blends [J]. Nat. Mater., 2005, 4(11):864-868.[4] Li Gang, Zhu Rui, Yang Yang. Polymer solar cells [J]. Nature Photonics, 2012, 6(3):153-161.[5] Aernouts T, Aleksandrov T, Girotto C, et al. Polymer based organic solar cells using ink-jet printed active layers [J]. Appl. Phys. Lett., 2008, 92(3):033306-1-3.[6] Krebs F C, Jorgensen M, Norrman K, et al. A complete process for production of flexible large area polymer solar cells entirely using screen printing——First public demonstration [J]. Solar Energy Materials & Solar Cells, 2009, 93(4):422-441.[7] Shaheen S E, Radspinner R, Peyghambarian N, et al. Fabrication of bulk heterojunction plastic solar cells by screen printing [J]. Appl. Phys. Lett., 2001, 79(18):2996-2998 .[8] Ding I K, Melas-Kyriazi J, Cevey-Ha N L, et al. Deposition of hole-transport materials in solid-state dye-sensitized solar cells by doctor-blading [J]. Organic Electronics, 2010, 11(7):1217-1222.[9] Hoth C N, Schilinsky P, Choulis S A, et al. Printing highly efficient organic solar cells [J]. Nano Lett., 2008, 8(9):2806-2813.[10] Hoth C N, Choulis S A, Schilinsky P, et al. On the effect of poly(3-hexylthiophene) regioregularity on inkjet printed organic solar cells [J]. J. Mater. Chem., 2009, 19(30):5398-5404.[11] Hoth C N, Choulis S A, Schilinsky P, et al. High photovoltaic performance of inkjet printed polymer: Fullerene blends [J]. Adv. Mater., 2007, 19(22):3973-3978.[12] Krebs F C. Fabrication and processing of polymer solar cells: A review of printing and coating techniques [J]. Solar Energy Materials & Solar Cells, 2009, 93(4):394-412.[13] Peumans P, Yakimov A, Forrest S R. Small molecular weight organic thin-film photodetectors and solar cells [J]. J. Appl. Phys., 2003, 93(7):3693-3727.[14] Stevens M A, Silva C, Russell D M, et al. Exciton dissociation mechanisms in the polymeric semiconductors poly(9,9-dioctylfluorene) and poly(9,9-dioctylfluorene-co-benzothiadiazole) [J]. Phys. Rev. B, 2001, 63(16):165213-1-18.[15] Schmidt-Hansberg B, Do H, Colsmann A, et al. Drying of thin film polymer solar cells [J]. Eur. Phys. J. Special Topics, 2009, 166(1):49-53.