Sintesis Grafena Oksida Tereduksi Terdoping Nitrogen Dan Sulfur Dari Amonium Tiosianat Sebagai Elektroda Lawan Pada Sistem Dye Sensitized Solar Cell (DSSC)

Sayekti Wahyuningsih, Ari Handono Ramelan, Mochammad Fuad, Qonita Awliya Hanif

Abstract

Pada penelitian ini telah berhasil disintesis komposit rGO-NS melalui pendopingan pada material berbasis grafena oksida tereduksi (rGO) dengan penambahan amonium thiosianat sebagai sumber dopan N dan S. Dopan N dan S pada rGO mempengaruhi struktur rGO yang ditunjukkan dengan pergeseran puncak difraktogram pada 2θ=24,97 (hkl 002). Spektra Fourier transform infrared (FTIR) material rGO-NS memberikan serapan puncak baru dari vibrasi C=N pada daerah 1501-1516 cm-1 dan dari vibrasi C-N serta C-S pada daerah 1130 – 1146 cm-1. Morfologi rGO-NS berupa lembaran tipis dua Dimensional (2D) bertumpuk dengan jarak antar lapis tertentu. Pengujian I-V measurement menggunakan Keithley 2602A, sistem DSSC dengan material rGO-NS digunakan sebagai bahan elektroda lawan menunjukkan efisiensi terbesar mencapai 0,1268%, dengan peningkatan efisiensi sebanyak 11,32 kali apabila dibandingkan dengan Pt.

Synthesis of Reduced Graphene Oxide doped with Nitrogen and Sulfur from Ammonium Thiocyanate as a Counter Electrode in Dye-Sensitized Solar Cell (DSSC) System. In this research, the rGO-NS composite was successfully synthesized through doping on reduced graphene oxide based-materials (rGO) with the addition of ammonium thiocyanate as nitrogen (N) and sulfur (S) source. N and S dopant influence the rGO structure indicated by the peak shifting into 2θ=24.97 (hkl 002). The Fourier transform infrared (FTIR) spectrum of material rGO-NS reveals new bands which correspond to C=N vibration within 1501 – 1516 cm-1 and C–N vibration together with C–S at area between 1130-1146 cm-1. The morphology of rGO-NS shows that the material consists of many 2 Dimensional (2D) thin layers. The current and voltage (I-V) measurement using Keithley 2602A with material rGO-NS as a counter electrode on DSSC system, demonstrates that the highest efficiency is 0.1268%. This performance is 11.32 times higher compare to the DSSC system with Pt.

Keywords

amonium thiosianat; DSSC; elektroda lawan; rGO-NS

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DOI: https://doi.org/10.20961/alchemy.16.1.34587.126-139

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