[1] Chaplin W J, Kjeldsen H, Christensen-Dalsgaard J, et al. Science, 2011, 332(6026): 213.
[2] Yang T Y, Wang M, Duan C, et al. Energy Environ. Sci., 2012, 5: 8208.
[3] Li Y F, et al. Acc. Chem. Res., 2012, 45: 723.
[4] Zheng Y Q, Dai Y Z, Zhou Y, et al. Chem. Commun., 2014, 50: 1591.
[5] Nickel F, Puetz A, Reinhard M, et al. Org. Electron., 2010, 11: 535.
[6] Yu J S, Wang N N, Zang Y, et al. Sol. Energy Mater. Sol. Cells, 2011, 95: 664.
[7] Kim J Y, Kim S H, Lee H H, et al. Adv. Mater., 2006, 18(5): 572.
[8] Yang L Y, Xu H, Tian H, et al. Sol. Energy Mater. Sol. Cells, 2010, 94: 1831.
[9] Chen L M, Xu Z, Hong Z, et al. J. Mater. Chem., 2010, 20: 2575.
[10] Wang J C, Ren X C, Shi S Q. Org. Electron., 2011, 12: 880.
[11] Huang C J, Ke J C, Chen W R, et al. Sol. Energy Mater. Sol. Cells, 2011, 95: 3460.
[12] Ghorashi S M B., Behjat A, Ajeian R. Sol. Energy Mater. Sol. Cells, 2012, 96: 50.
[13] Lee J Y, Lee T, Park H J, et al. Org. Electron., 2014, 15: 2710.
[14] Jiang X X, Xu H, Yang L G, et al. Sol. Energy Mater. Sol. Cells, 2009, 93: 650.
[15] Yang L Y, Xu H, Tian H, et al. Sol. Energy Mater. Sol. Cells, 2010, 94: 1831.
[16] Parthasarathy G, Shen C, Kahn A, et al. Appl. Phys. Lett., 2001, 89: 4986.
[17] Tyagi P, Srivastava R, Kumar A, et al. Org. Electron., 2013, 14: 1391.
[18] Wei H X, Ou Q D, Zhang Z, et al. Org. Electron., 2013, 14: 839.
[19] Kao P C, Wang J Y, Lin J H, et al. Thin Solid Films, 2013, 527: 338.
[20] Yang L Y, Xu H, Tian H, et al. Sol. Energy Mater. Sol. Cells, 2010, 94: 1831.
[21] Song Q L, Li F Y, Yang H, et al. Chem. Phys. Lett., 2005, 416: 42.
[22] Vivo P, Jukola J, Ojala M, et al. Sol. Energy Mater. Sol. Cells, 2008, 92: 1416.