You-Heng LinYu-Tang TsaiCHUNG-CHIH WUChih-Hung TsaiChien-Hung ChiangHsiu-Fu HsuJey-Jau LeeChing-Yuan Cheng2018-09-102018-09-102012-11http://scholars.lib.ntu.edu.tw/handle/123456789/374107https://www.scopus.com/inward/record.uri?eid=2-s2.0-84865059049&doi=10.1016%2fj.orgel.2012.07.023&partnerID=40&md5=4ce499041342f6e0a22cf2d55af0bc03We report a comparative study on spectral and morphological properties of two blend systems for polymer solar cells: the donor material poly(3-hexylthiophene) (P3HT) in combination with the acceptor material of either [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) or indene-C60 bisadduct (ICBA) that was reported to enhance efficiencies of polymer solar cells. Optical microscopy and grazing incidence X-ray scattering reveal the stronger tendency of PCBM to from larger and more ordered domains/grains than ICBA either in pure or blend films. Compared to PCBM, the presence of ICBA also substantially perturbs the organization and longer-range ordering of P3HT in increasing the ICBA ratio in blends. With larger and more ordered phase-separated domains, the P3HT/PCBM blend films exhibit significant optical scattering at higher PCBM ratios. Yet, such optical scattering is not significant for P3HT/ICBA blends (even with high ICBA ratios). Overall, results here suggest the reported higher efficiencies of P3HT/ICBA solar cells (vs. P3HT/PCBM cells) cannot be attributed to larger and/or more ordered phase-separated donor-acceptor domains and other characteristics play more important roles in this case. © 2012 Elsevier B.V. All rights reserved.Fullerene; GIXS; Morphology; Poly(3-hexylthiophene); Polymer solar cells[SDGs]SDG7Butyric acid; Carrier mobility; Efficiency; Fullerenes; Light scattering; Morphology; Polymer solar cells; Polymers; X ray scattering; Comparative studies; GIXS; Grazing-incidence x-ray scattering; Higher efficiency; Morphological properties; Optical scattering; Poly (3-hexylthiophene); [6 ,6]-phenyl-C61-butyric acid methyl esters; Solar cellsjournal article10.1016/j.orgel.2012.07.0232-s2.0-84865059049WOS:000311177700017