KARAKTERISTIK STRUKTUR, OPTIK, DAN LISTRIK FILM TIPIS POLIANILIN (PANI) DOPING HCl YANG DITUMBUHKAN DENGAN METODE SPIN COATING

Abstract

PANi-HCl dengan variasi konsentrasi dopan HCl 0,5M; 1M; 1,5M; 2M telah berhasil disintesis menggunakan metode polimerisasi interfasial yang menghasilkan endapan berwarna hijau tua. Perubahan karakteristik PANi akibat pengaruh dopan HCl tersebut diamati melalui terbentuknya ikatan cincin terprotonasi, perubahan energi gap serta konduktivitasnya. Struktur ikatan polimer sampel dikarakterisasi menggunakan FTIR (Fourier Transform Infra Red). Hasil karakterisasi FTIR menunjukkan keberadaan ikatan cincin kuinoid dan benzoid, serta vibrasi stretching (C-N), bending (C-H), stretching (C=N) cincin kuinoid terprotonasi (H+). Film tipis PANi-HCl ditumbuhkan pada kecepatan 600 rpm selama 10 detik dengan metode spin coating. Transmitansi optik dikarakterisasi dengan spektrometer UV-vis dan konduktivitas listrik dianalisis dari pengukuran I-V meter. Nilai transmitansi semakin kecil pada peningkatan konsentrasi dopan dengan nilai terkecil ~76% yang dimiliki konsentrasi 1,5M. Nilai energi gap mengalami penyusutan sesuai dengan peningkatan konsentrasi dopan sebesar 3,9 Ev, 3,7 eV, 3,2 eV, dan 5,0 eV. Sedangkan nilai konduktivitas film yang dihasilkan antara 1,39x10-6 (Ωcm)-1 sampai 5,90x10-5 (Ωcm)-1.

 

PANi-HCl with variations in dopant concentration of 0.5 M HCl; 1M; 1.5 M; 2M has been successfully synthesized using interfacial polymerization method that produces dark green precipitate. PANi characteristic changes due to the influence of HCl dopant were observed in the protonated ring bond formation, changes in the energy gap and conductivity. The structure of the polymer bonding samples were characterized using FTIR (Fourier Transform Infra Red). FTIR characterization results indicate the presence of ties and benzoid kuinoid ring, as well as stretching vibration (CN), bending (CH), stretching (C=N) ring kuinoid protonated (H +). PANi-HCl thin films were grown at a speed of 600 rpm for 10 seconds with a spin coating method. Optical transmittance characterized by UV-vis spectrometer and analyzed the electrical conductivity of IV measurement meters. Transmittance value the smaller the increase in dopant concentration with the smallest value of ~ 76% is owned by a concentration of 1.5 M. Value of the energy gap shrinkage in accordance with the increase in dopant concentration of 3,9 Ev, 3,7 eV, 3,2 eV, and 5,0 eV. While the resulting film conductivity values between 1,39 x10-6 (Ωcm) -1 to 5,90 x10-5 (Ωcm) -1.