Cho, Chung-Ki Hwang, Woo-Jin Eun, Kyoungtae Choa, Sung-Hoon Na, Seok-In Kim, Han-Ki 2024-01-20T16:01:18Z 2024-01-20T16:01:18Z 2021-09-04 2011-12 0927-0248 https://pubs.kist.re.kr/handle/201004/129781 The mechanical flexibility of transparent poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films printed onto a flexible PET substrate using a gravure printing method was investigated using a lab-made bending test system. Gravure-printed PEDOT:PSS electrodes with a sheet resistance of 359 Omega/square and a transparency of 88.92% showed outstanding flexibility in several types of flexibility tests, including outer/inner bending, twisting and stretching. Notably, the PEDOT:PSS electrode had a constant resistance change (Delta R/R-0) within an outer and inner bending radius of 10 mm. In addition the stretched PEDOT:PSS electrode showed a fairly constant resistance change (Delta R/R-0) up to 4%, which is more stable than the resistance change of conventional amorphous ITO electrode. The twisting test revealed that the resistance of the PEDOT:PSS electrode began to increase at an angle of 36 degrees due to delamination of the film from the PET substrate. Despite the high sheet resistance of the PEDOT:PSS electrode the flexible organic solar cells fabricated on the PEDOT:PSS electrode showed a power conversion efficiency of similar to 2% (FF: 44.9%, V-o.: 0.495 V and J(sc): 9.1 mA/cm(2)), indicating the possibility of using gravure printed PEDOT:PSS as a flexible and transparent electrode for printing-based flexible organic solar cells. (C) 2011 Elsevier B.V. All rights reserved. English ELSEVIER Mechanical flexibility of transparent PEDOT:PSS electrodes prepared by gravure printing for flexible organic solar cells Article 10.1016/j.solmat.2011.07.009 1 SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.95, no.12, pp.3269 - 3275 SOLAR ENERGY MATERIALS AND SOLAR CELLS 95 12 3269 3275 scie scopus 000297449500018 2-s2.0-80053614660 Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Energy & Fuels Materials Science Physics Article Flexibility PEDOT:PSS Gravure printing Bending test Organic solar cells