Article Per Year (5 Year)
p-Index From 2019 - 2024
4.347
P-Index
This Author published in this journals
All Journal POSITRON Jurnal Spektra INDONESIAN JOURNAL OF APPLIED PHYSICS Spektra: Jurnal Fisika dan Aplikasinya Jurnal Material dan Energi Indonesia Jurnal Ilmu dan Inovasi Fisika
Lusi Safriani
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Padjadjaran, Bandung
Aerospace Engineering Astronomy Computer Science & IT Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics

Published : 25 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 25 Documents
Search

 1   2   3 
Pembuatan dan Karakterisasi Bahan Organik Berbasis TTF dengan Akseptor TCNQ dan RbZn(SCN)4 Evan Mulyana; Nadya Larasati K; Thoriq S. Rahman; Lusi Safriani; H Taniguchi; Risdiana Risdiana
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 1, No 1 (2017)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (513.824 KB) | DOI: 10.24198/jiif.v1i01.10900

Abstract

Telah disintesis bahan organik yaitu TTF-TCNQ dan θ-(BEDT-TTF)2RbZn(SCN)4dengan metode difusi untuk kristal TTF-TCNQ dan metode elektrokimia untuk kristal θ-(BEDT-TTF)2RbZn(SCN)4. TTF-TCNQ merupakan kristal yang di dalamnya terjadi charge transfer yang dapat mengalami penurunan resistivitas ketika suhunya diturunkan. Sedangkan kristal θ-(BEDT-TTF)2RbZn(SCN)4adalah kristal yang mengalami perubahan sudut θ yang mengakibatkan terjadinya kenaikan nilai resistivitas secara signifikan pada suhu tertentu.
Photocurrent Density Enhancement of DSSC with Existence of ZnO in TiO2 Based Photoanode Lusi Safriani; Nurfitriani Nurfitriani; Ayunita Chintia Celline; Annisa Aprilia; Yukio Furukawa
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 13, No 2 (2023): IJAP Volume 13 ISSUE 02 YEAR 2023
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v13i2.74821

Abstract

One of the important components of a dye-sensitized solar cell (DSSC) is photoanode which plays a critical role serving as the center of conversion energy. Photoanode consists of transparent conducting substrate, a semiconductor layer, and dyes molecules as sensitizers. Titanium dioxide (TiO2) is widely used as a photoanode because it is a mesoporous and stable material despite its high recombination rate. To reduce the recombination rate and improve electron transport, TiO2 is combined with other materials such as ZnO to form TiO2/ZnO composites. ZnO is a good choice because it has higher electron mobility than TiO2 to inhibit recombination. The synthesis process of TiO2/ZnO composites was carried out using the sol-gel method with variations in the weight percentage of ZnO. The TiO2/ZnO composite was then applied as a photoanode in DSSC. The J-V measurement results shows that the DSSC with TiO2/ZnO 25wt% composite layer as the photoanode produced the highest efficiency of 0.86%. This increase in efficiency was due to an increase in the photo-current of photoanodes that have more ZnO content. The presence of ZnO leads to faster-moving electron transport, therefore reducing recombination and increasing efficiency.
Low Temperature Calcination of TiO2 and ZnO Particle Film and Evaluation of Their Photocatalytic Activity Inovasari Islami; Lutfi Naufal Ramadhika; Lusi Safriani; Ayi Bahtiar; Fitrilawati Fitrilawati; Nowo Riveli; Annisa Aprilia
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 13, No 2 (2023): IJAP Volume 13 ISSUE 02 YEAR 2023
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v13i2.76028

Abstract

In this study, TiO2, ZnO, and TiO2/ZnO films were prepared under low calcination temperature and characterized to observe their properties related to photocatalytic performance. The samples were prepared by mixing the gel phase of ZnO precursor, TiO2 anatase powder, triton-x 100, and acetylacetone to produce a paste form for the deposition process. The resulting paste was then deposited by screen printing onto a glass substrate and subjected to calcination at 250C to facilitate the ZnO crystallization and remove other additive materials. XRD analysis confirms that the formation of ZnO and TiO2 crystals was assisted, although their crystallinity was lower than corresponding particulate forms. The lower crystallinity seems to be related by additive materials remains. The surface morphology of each sample was observed by scanning electron microscopy (SEM) imaging, Brunauer–Emmett–Teller (BET), and contact angle examination. Interestingly, both TiO2 and ZnO layers tend to have a hydrophobic surface meanwhile TiO2/ZnO has a hydrophilic surface. BET analysis revealed that ZnO has the highest specific surface area due to a nanosized. FTIR spectra confirmed the presence of appropriate chemical bonds in the ZnO and TiO2 and other additive materials, such as alkyl groups. The photoluminescence (PL) spectrum shows a blue emission associated with intrinsic defects such as vacancies and interstitials of Zn and Ti in all samples. Differences in the photocatalytic performance of film and particulate form for each material were observed and analyzed. All samples' structures, morphology, and PL characteristics were then correlated to their photocatalyst behavior for methylene blue degradation.
NMR Characterization of Polymethylhydrosiloxane Synthesized using Dichloromethane and Diethyl Ether as Solvent for Vitreous Substitute Nabillah Fa'diyyah Zahra; Diba Grace Auliya; Vira Fuji Arini; Fitrilawati Fitrilawati; Lusi Safriani; Risdiana Risdiana
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 13, No 2 (2023): IJAP Volume 13 ISSUE 02 YEAR 2023
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v13i2.72694

Abstract

Polymethylhydrosiloxane (PMHS) can be synthesized from dichloromethylsilane (DCHS) by the hydrolysis-condensation method. In this synthesis method, a solvent is needed. Dichloromethane (DCM) or diethyl ether (DE) can be used as a solvent in the synthesis of PMHS. These two solvents greatly affect the physical properties of the resulting PMHS. Therefore, studies are needed to look at the characteristics and chemical content of the PMHS synthesized using these two solvents. In this research, we reported the characteristics and content studies of PMHS synthesized using different solvents, DCM and DE, using 1H-NMR and 13C-NMR. It was found that both samples had three peaks (Si-H, Si-CH3, and Si-CH3) on 1H-NMR measurement and one peak (Si-CH3) on 13C-NMR measurement. All of the peaks found were by the characteristics of PMHS and no other elements were found from solvents indicating that the PMHS samples had been successfully synthesized with a high degree of purity. In addition, the possibility of structures formed in the PMHS samples was also obtained.
The Electrical Characteristic Analysis of Reduced Graphene Oxide in Pt-Free DSSC Using Single Diode Model and Electrochemical Impedance Spectroscopy Aprilia, Annisa; Yuliasari, Fitri; Siregar, R.E; Syakir, Norman; Bahtiar, Ayi; Safriani, Lusi; Hidayat, Sahrul; Hanipah, Iip; Fitrilawati, Fitrilawati
POSITRON Vol 12, No 2 (2022): Vol. 12 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v12i2.54272

Abstract

We studied the characteristic of reduced graphene oxide (rGO) as a counter electrode (CE) in Pt-free dye-sensitized solar cell (DSSC) using single diode model equation based on current density-voltage (J-V) measurement. The electrical characteristics of DSSC was investigated by electrochemical impedance spectroscopy (EIS) in order to knowing the catalytic properties of rGO as counter electrode. The rGO thin film as CE was deposited on fluorine-doped tin oxide (FTO) substrate and stacked with FTO/TiO2/ruthenium dye/mosalyte/rGO/FTO DSSC structure. The rGO film was obtained from GO (graphene oxide) film that was thermally reduced at 200°C for one hour under argon flow. The performance of DSSC with rGO as CE was characterized by current-voltage measurement and the interface between each layer was observed by Electrochemical Impedance Spectroscopy (EIS).   The device efficiency (η) of DSSC that used GO and rGO film as CE are 0.09% and 3.43%, respectively. DSSC parameters such as series resistance (RS) shunt resistance (RSH), and ideality factor (n) were obtained from J-V curve which analyzed using single diode model equation. All samples have a Rs value of 2 indicates that all devices have a good ohmic contact. The RSH of device using rGO-1mg/ml is increase (from 2850 to 3670 Ω.cm2) compared with GO indicate that thermal reduction is successes. The rGO film shows a comparable performance to Pt-conventional CE thus it is a good candidate as alternative of DSSC counter electrode.
Co-Authors Adelia Septyani Afifah Nurida Afifah Nurida, Afifah AMALIA ROHMAH FAJARIAH Annisa Aprilia Annisa Aprilia Annisa Aprilia ARIF BAGUS PRAKOSO Ayi Bahtiar Ayi Bahtiar Ayunita Chintia Ayunita Chintia Celline Ayunita Chintia, Ayunita BAYU PERMANA Choiry Ghina Afrilia CHOIRY GINA AFRILIA Cukup Mulyana Cukup Mulyana Cukup Mulyana Cukup Mulyana Davi Putri Hanavi Diba Grace Auliya Euis Siti Nurazizah Euis Siti Nurazizah Euis Siti Nurazizah, Euis EVAN MULYANA Evan Mulyana EVAN MULYANA, EVAN F FITRILAWATI Ferry Faizal Fitri Yuliasari FITRILAWATI F Fitrilawati Fitrilawati Fitrilawati Fitrilawati Fitrilawati Fitrilawati H Taniguchi H Taniguchi Hanipah, Iip HERI FERNANDO Iman Rahayu Inovasari Islami Liu Kin Men Lutfi Naufal Ramadhika LUTFI NAUFAL RAMADHIKA MALA SAPUTRI MUHAMMAD ARYA REVANSYAH MUHAMMAD RIZKY NURAWAN Nabila Asy Syifa Nabila Asy Syifa, Nabila Nabillah Fa'diyyah Zahra NADYA LARASATI Nadya Larasati K NADYA LARASATI K, NADYA Norman Syakir, Norman Nowo Riveli NUR APRILIA AMANDA Nurfitriani Nurfitriani Permana, Bayu RAHMADANI RAHMADANI RAHMAT HIDAYAT RESTI RAHAYU DWI AGUSTINI RISDIANA R Risdiana Risdiana Risdiana Risdiana RISDIANA RISDIANA, RISDIANA S Setianto Sahrul Hidayat Saputri, Mala SHEILA SAKKYANANDA Sheila Sakkyananda Sheila Sakkyananda, Sheila Siregar, R.E Sri Suryaningsih TATI NURHAYATI THORIQ S RAHMAN Thoriq S. Rahman THORIQ S. RAHMAN, THORIQ Togar Saragi, Togar Tuti Susilawati Tuti Susilawati Tuti Susilawati Vira Fuji Arini Winna Prasita Primawati Yukio Furukawa YULIASARI, FITRI ZANETA HELGA LOVELY WIBOWO