Hong, Eun-Young Lee, Suck-Hyun Lee, Dong-Ki Choi, Seung-Seok Baek, Kyung-Youl Hwang, Seung-Sang Kwon, O-Pil 2024-01-20T14:03:30Z 2024-01-20T14:03:30Z 2021-09-04 2012-09 0959-9428 https://pubs.kist.re.kr/handle/201004/128941 We report on conducting polyaniline (PANI) films doped with a thermally stable polymer dopant, linear ladder-type sulfonated polyphenylsilsesquioxane (S-PPSQ). The PANI/S-PPSQ films exhibited high-temperature stable electrical conductivity. With a heat treatment at 120 degrees C, the electrical conductivity of conventional PANI films doped with the molecular dopant camphorsulfuric acid (CSA) rapidly decreased to half of its initial value, while that of PANI/S-PPSQ films were relatively unaffected. Moreover, PANI/S-PPSQ films with high electrical conductivity exhibited unusual negative temperature coefficient of resistance (TCR) values above room temperature, in contrast to conventional PANI/CSA films that exhibited positive TCR values. By using a solution blend of PANI/S-PPSQ and PANI/CSA with negative and positive TCR values, respectively, we successfully demonstrated control of TCR behavior. Therefore, PANI/S-PPSQ materials are very promising for organic electronic applications. English ROYAL SOC CHEMISTRY CAMPHORSULFONIC ACID POLYMER Polyaniline films doped with ladder-type sulfonated polyphenylsilsesquioxane and unusual dependence of their electrical conductivity on temperature Article 10.1039/c2jm32158k 1 JOURNAL OF MATERIALS CHEMISTRY, v.22, no.35, pp.18151 - 18155 JOURNAL OF MATERIALS CHEMISTRY 22 35 18151 18155 scie scopus 000307582800012 2-s2.0-84864968127 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article CAMPHORSULFONIC ACID POLYMER Polyaniline electrical conductivity ladder-type polylsilsesquioxane sulfonated polyphenylsilsesquioxane negative temperature coeffi cient of resistance