Park, So Hyun Park, Sungmin Lee, Seungjin Kim, Jiho Ahn, Hyungju Kim, Bumjoon J. Chae, Boknam Son, Hae Jung 2024-01-19T16:30:31Z 2024-01-19T16:30:31Z 2021-09-02 2020-11 2211-2855 https://pubs.kist.re.kr/handle/201004/117943 To transfer spin-coating based high performance polymer solar cells (PSCs) to large area using roll-to-roll compatible solution process, it is important to understand effect of the processing method and materials on morphology of bulk-heterojunction (BHJ) films. We developed PBDB-T based PSCs modules using PC71BM or nonfullerene acceptor ITIC with blade coating. It is found that crystallization of ITIC and its following aggregation are significantly affected by solvent drying dynamics which is induced by thermal heating whereas PC71BM shows similar BHJ morphology regardless heating temperature. We studied mechanism and effects of acceptors on BHJ film forming during the coating. ITIC-solvent interaction makes ITIC to form high crystalline structures and but, large aggregated domains during slow solvent evaporation at room temperature. Such aggregated morphology of PBDB-T:ITIC is much improved to optimal morphology for effective charge generation and transporting with a 50 degrees C heating process. As a result, PBDB-T:ITIC photovoltaic module (active area 58.5 cm(2)) prepared at 50 degrees C showed much enhanced efficiency of 9.03% than 5.0% of room temperature processed one. This result is among the highest performance of large active-area PSC modules and provides research guidelines for efficient transfer of spin-coating based small cell technology to roll-to-roll based large-area PSC modules. English ELSEVIER POLYMER SOLAR-CELLS NON-FULLERENE ACCEPTOR SMALL-MOLECULE ACCEPTOR Developement of highly efficient large area organic photovoltaic module: Effects of nonfullerene acceptor Article 10.1016/j.nanoen.2020.105147 1 NANO ENERGY, v.77 NANO ENERGY 77 scie scopus 000581738300045 2-s2.0-85089195388 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article POLYMER SOLAR-CELLS NON-FULLERENE ACCEPTOR SMALL-MOLECULE ACCEPTOR Polymer solar cells Nonfullerene acceptor Blade coating Processing temperature Large area module