Modeling and experiment of dye-sensitized solar cell with vertically aligned ZnO nanorods through chemical bath deposition

Abstract

A theoretical model based on electron diffusion differential equation and Schottky barrier model was developed to determine the current-voltage characteristics of DSSC. To verify the model DSSC with ZnO nanorods photoelectrode which was chemically bath deposited onto the TCO was fabricated. According to modeling results, increasing of recombination current density J at these interfaces results in a decrease in Schottky barrier height ϕ b and therefore improves the photovoltage under the open-circuit condition. It is found that the open-circuit voltage remains constant when the TCO/ZnO Schottky barrier height was varied in the range of 0.45 -0.6 eV. This theoretical model consistents with the experimental result in which the fabricated DSSCs can produce conversion efficiency in the range of 0.98 -1.16%. The trend in photovoltage calculated in the theoretical model basically agrees with the experimental result, although the calculated photocurrent is somewhat over estimated compared to the experimental results. The model presents that the ideality factor for ZnO nanorods, which also contributes to the enhancement of photovoltage, increases in the range of 2.75 -3.0 as the annealing temperature is increased in the experiment.

Preparasi dan Karakterisasi Dye-sensitized Solar Cell (DSSC) dengan Pewarna Ekstrak Jeruk: Pengaruh Variasi Komposisi Karotenoid dan Flavonoid Terhadap Efisiensi Sel Surya

“…Pada perekayasaan semikonduktor untuk anoda DSSC, penggunaan material ZnO cukup menjanjikan dikarenakan sifat fisika yang lebih baik dibandingkan TiO 2 . Potensial pita konduksi lebih tinggi dibandingkan TiO 2 sehingga dapat menghasilkan tegangan yang lebih besar, mobilitas elektron yang sangat cepat sehingga berpotensi mengurangi faktor rekombinasi, serta memiliki struktur dan morfologi yang dapat diubah-ubah menyesuaikan kondisi sintesis [6][7][8]. Selain itu pemanfaatan bahan pewarna organik juga mulai dikembangkan cukup masif dikarenakan molekul pewarna kompleks Pewarna kompleks berbasis Ruthenium dikategorikan sebagai bahan anorganik yang tidak ramah lingkungan serta membutuhkan biaya sintesis yang mahal.…”