Kim, Joon-Sung Chung, Won-Suk Kim, Kyungkon Kim, Dong Young Paeng, Ki-Jung Jo, Seong Mu Jang, Sung-Yeon 2024-01-20T18:32:29Z 2024-01-20T18:32:29Z 2021-09-05 2010-10 1616-301X https://pubs.kist.re.kr/handle/201004/131068 Polymer solar cells (PSCs) are fabricated using a novel film deposition method, the electrostatic spray (e-spray) technique. Stable atomization and uniform deposition of the polymer blend by e-spray are achieved by manipulating the solution concentration, the solvent composition, and the electric field. The performance of PSCs is primarily influenced by the inherent film morphology of the e-sprayed polymer-blend active layers, which is significantly different from that of the conventional films that are formed using the spin-coating (SC) method. The intrinsically formed interfacial boundaries between the e-sprayed blend pancakes resist charge transport, which unfavorably influences device efficiency. The internal series resistance (R(S)) of the PSCs that are formed using the e-spray method (e-spray-PSC) is significantly reduced by a solvent vapor soaking (SVS) treatment in addition to the conventional thermodynamic nanomorphology controls. The detailed relationship between the morphologies (film morphology and internal nanomorphology) and the R S is revealed using impedance spectroscopy. The performance of the e-spray-PSCs is comparable to those of the PSCs that are fabricated using the SC method under identical conditions. Therefore, the e-spray method can be used to fabricate ultralow-cost PSCs, because of the performance results combined with the intrinsic advantages that the e-spray method is simple and has a low materials loss. English WILEY-V C H VERLAG GMBH Performance Optimization of Polymer Solar Cells Using Electrostatically Sprayed Photoactive Layers Article 10.1002/adfm.201000433 1 ADVANCED FUNCTIONAL MATERIALS, v.20, no.20, pp.3538 - 3546 ADVANCED FUNCTIONAL MATERIALS 20 20 3538 3546 N scie scopus 000284000200015 2-s2.0-78149428702 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article ENERGY-CONVERSION EFFICIENCY CONE-JET MODE ELECTROSPRAY DEPOSITION ORGANIC PHOTOVOLTAICS THIN-FILM ELECTROHYDRODYNAMIC ATOMIZATION PROTEIN MICROARRAYS MORPHOLOGY CONTROL DESIGN RULES FABRICATION bulk heterojunctions electrospray impedance spectroscopy internal resistance polymer solar cells