Pengaruh Waktu Pengadukan Terhadap Efektifitas Kinerja Membran Cetak Polyvinylidene Fluoride (PVDF) Sebagai Aplikasi Polimer Elektrolit Pada Stabilitas Jangka Panjang dan Efisiensi Listrik Dye-Sensitized Solar Cell (DSSC)

The Effect Of Stirring Time On The Effectiveness Of Polyvinylidene Fluoride (PVDF) Printed Membrane As A Polymer Electrolyte Application On Long-Term Stability and Electrical Efficiency Of Dye-Sensitized Solar Cell (DSSC)

DSSC menarik perhatian karena kemampuannya mengkonversi energi foton menjadi energi listrik. Prinsip kerja DSSC adalah elektrokimia, di mana pewarna bertindak sebagai donor elektron (photosensitizer), semikonduktor sebagai kolektor elektron, dan elektrolit sebagai mediator listrik untuk menghasilkan siklus sel DSSC. Meskipun potensial, stabilitas jangka panjang menjadi persoalan utama komersialisasi DSSC. Stabilitas DSSC ditentukan oleh dua komponen utama yaitu pewarna dan elektrolit, di mana keduanya rentan terhadap kebocoran dan volatilitas elektrolit. Sebagai solusi, penelitian ini bertujuan untuk menganalisis efektifitas polimer elektrolit membran PVDF 18%, dan mengetahui waktu optimum pengadukan membran pada variasi 8, 10, 12 dan 14 jam. Pigmen klorofil daun pandan suji (Pleomele Angustifolia) dimanfaatkan sebagai photosensitizer. Efektifitas photosensitizer daun pandan suji diidentifikasi dengan spektrofotometri UV-Visible dan dihasilkan λ_maks 464,5 nm (klorofil-a) dan  664,50 nm (klorofil-b). Karakterisasi elektrokimia dengan voltametri siklik menghasilkan HOMO -4,3159 eV dan LUMO -3,1201 eV. Energi celah pita (bandgap) dari perhitungan metode Touch plot menghasilkan 1,813 eV. Hasil uji kinerja rangkaian DSSC dengan multimeter menunjukkan nilai V_oc 326 mV, J_sc 6,8 x 10^-3 mA, dan nilai efisiensi terbesar 0,72% dengan waktu pengadukan membran 10 jam. Hasil penelitian menunjukkan polimer elektrolit PVDF dan photosensitizer  klorofil daun pandan suji berpotensi sebagai alternatif rangkaian DSSC.

Kata-kata kunci: DSSC, polimer elektrolit, efisiensi, klorofil, stabilitas.

DSSC attracted attention because of its ability to convert photon energy into electrical energy. The working principle of DSSC is electrochemistry, in which the dye acts as an electron donor (photosensitizer), a semiconductor as an electron collector, and an electrolyte as an electrical mediator to produce a DSSC cell cycle. Despite the potential, long-term stability is a major issue for the commercialization of DSSC. The stability of the DSSC is determined by two main components, namely the dye and the electrolyte, both of which are susceptible to leakage and electrolyte volatility. As a solution, this study aims to analyze the effectiveness of the 18% PVDF membrane electrolyte polymer and determine the optimum time for stirring the membrane at variations of 8, 10, 12, and 14 hours. The chlorophyll pigment of pandan suji leaf (Pleomele Angustifolia) is used as a photosensitizer. The effectiveness of pandan suji leaf photosensitizer was identified by UV-Visible spectrophotometry and the resulting max of 464.5 nm (chlorophyll-a) and 664.50 nm (chlorophyll-b). Electrochemical characterization with cyclic voltammetry resulted in HOMO -4.3159 eV and LUMO -3.1201 eV. The bandgap energy from the calculation of the Touch plot method produces 1.813 eV. The results of the DSSC circuit performance test with a multimeter showed the value of V_oc 326 mV, J_sc 6.8 x 10-3 mA, and the highest efficiency value was 0.72% with a membrane stirring time of 10 hours. The results showed that PVDF electrolyte polymer and pandan suji leaf chlorophyll photosensitizer have potential as alternatives to DSSC circuits.

Keywords: DSSC, polymer electrolyte, efficiency, chlorophyll, stability.