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Submitted
February 24, 2022
Accepted
April 27, 2022
Published
May 10, 2022
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Abstract

ABSTRAK

 

Klorofil merupakan pigmen berwarna hijau yang terdapat pada tumbuhan atau daun yang berwarna hijau. Pigmen klorofil berfungsi menyerap energi cahaya dan mengkonversi energi cahaya tersebut menjadi energi kimia. Selain itu, klorofil juga dapat mentransfer elektron, sehingga pigmen ini dapat digunakan sebagai fotosensitizer alami pada perangkat sel surya tersensitisasi dye (DSSC). Fotosensitizer alami memiliki beberapa kelebihan seperti harganya yang murah, jumlah berlimpah, ramah lingkungan, dan proses sintesis yang mudah. Tanaman cincau (Cyclea barbata) merupakan tanaman yang populer di Indonesia. Tanaman ini sering digunakan pada industri makanan, minuman, farmasi, dan lain sebagainya. Penelitian ini bertujuan untuk mengidentifikasi pigmen klorofil dan besar celah energi pada daun Cyclea barbata yang akan diaplikasikan pada sel surya tersensitisasi dye (DSSC). Prosedur kerja dalam penelitian ini yaitu: (1) ekstraksi pigmen klorofil, (2) pemurnian pigmen klorofil, (3) karakterisasi pigmen klorofil, dan (4) penentuan besar celah energi pigmen klorofil. Pigmen klorofil daun Cyclea barbata diekstraksi menggunakan larutan etanol dengan perbandingan 1:5 (volum/volum). Proses pemurnian pigmen dilakukan dengan teknik evaporasi pada suhu 30°- 40°C. Karakterisasi UV-Vis digunakan untuk mengetahui rentang penyerapan pigmen klorofil dan celah energi yang terdapat pada daun Cyclea barbata. Hasil penelitian menujukkan rentang penyerapan pigmen daun Cyclea barbata terletak pada rentang panjang gelombang 402 nm dan 660 nm. Celah energi pigmen daun Cyclea barbata diperoleh sebesar 1,804 eV.

Kata  kunci—klorofil, celah energi, fotosensitizer alami, DSSC.

 

ABSTRACT

 

Chlorophyll is a green pigment found in green-coloured plants or leaves. Chlorophyll pigment absorbs energy from light and convert it into chemical energy. Moreover, it can transfer electrons, so it can be used as a natural photosensitizer on dye-sensitized solar cell (DSSC) device. Natural photosensitizer has several advantages, such as its lower cost, abundant quantities, eco-friendly, and easy to synthesize. Grass jelly (Cyclea barbata) is a popular plant in Indonesia. The plant is often used in the food, beverage, and pharmaceutical industry. This research aimed to identify the chlorophyll pigment and gap energy from Cyclea barbata leaf which will be applied to dye-sensitized solar cell (DSSC). The procedures in this research were: (1) extracted the chlorophyll pigment, (2) purified the chlorophyll pigment, (3) characterized the chlorophyll pigment, and (4) determined the gap energy of the chlorophyll pigment. Chlorophyll pigment of Cyclea barbata leaf was extracted using ethanol solution with ratio 1:5 (v/v). Pigment purification process was held using evaporation technique at temperature of 30°-40°C. UV-Vis characterization was carried out to determine the range of chlorophyll pigment absorbance and gap energy of Cyclea barbata leaf. The result showed that the range of chlorophyll pigment absorbance lies in wavelength about 402 nm and 660 nm. The gap energy of chlorophyll pigment from Cyclea barbata leaf was obtained at 1,804 eV.

 

Keywords—chlorophyll, gap energy, natural photosensitizer, DSSC.

Keywords

klorofil celah energi fotosensitizer alami DSSC

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How to Cite
Saleh, I., & Halidun, W. O. N. S. (2022). IDENTIFIKASI PIGMEN KLOROFIL DAN CELAH ENERGI PADA DAUN CINCAU (CYCLEA BARBATA) SEBAGAI FOTOSENSITIZER ALAMI UNTUK APLIKASI DSSC. Jurnal Kumparan Fisika, 5(1), 31–36. https://doi.org/10.33369/jkf.5.1.31-36
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