Investigating a sulfonate-rich carbon dot as a sensitizer in dye-sensitized solar cells

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Optical and Quantum Electronics Pub Date : 2025-01-06 DOI:10.1007/s11082-024-07988-y

Muhammad Haniff Mokti, Hairul Anuar Tajuddin, M. H. Buraidah, Simon Maher, Abdur Rahman, Ninie Suhana Abdul Manan, Shameer Hisham, Zanariah Abdullah

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Abstract

Carbon dots (CDs) synthesized using the direct heating method were examined as potential sensitizers in dye-sensitized solar cells (DSSCs). The energy gap (E_g) of green, yellow, orange, and red emission CDs (G-, Y-, O-, and R-CDs) was modulated by varying the amount of concentrated sulfuric acid. Ultraviolet-visible (UV-Vis) spectroscopy was employed to ascertain the E_g of these CDs. R-CD synthesized with 1.35 mL (24.82 mmol) of concentrated sulfuric acid exhibited the lowest E_g of 2.07 eV. The Lowest Unoccupied Molecular Orbital (LUMO) and Highest Occupied Molecular Orbital (HOMO) of these synthesized CDs ranged from 2.98 to 3.14 eV and 5.05 to 5.60 eV, respectively. The TiO₂ electrode was sensitized with R-CD under different conditions including varying time, temperature, and concentrations. The resulting DSSC exhibited an efficiency of 0.16%, a short-circuit current density (J_SC) of 0.61 mA/cm², and an open-circuit voltage (V_OC) of 0.41 V. These parameters were obtained for DSSC with the TiO₂ electrode sensitized with R-CD for 2 hours at 40 °C using a 10 mg/mL solution of R-CD.

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研究富磺酸碳点在染料敏化太阳能电池中的敏化作用

研究了直接加热法制备的碳点（CDs）作为染料敏化太阳能电池（DSSCs）的潜在敏化剂。绿色、黄色、橙色和红色发射CDs （G-、Y-、O-和R-CDs）的能隙（Eg）可以通过浓硫酸的加入量来调节。用紫外-可见光谱法测定了这些cd的Eg。1.35 mL （24.82 mmol）浓硫酸合成的R-CD Eg最低，为2.07 eV。合成的CDs的最低未占据分子轨道（LUMO）和最高已占据分子轨道（HOMO）分别在2.98 ~ 3.14 eV和5.05 ~ 5.60 eV之间。在不同的条件下，包括不同的时间、温度和浓度，R-CD敏化TiO2电极。所得的DSSC效率为0.16%，短路电流密度（JSC）为0.61 mA/cm2，开路电压（VOC）为0.41 V。使用10 mg/mL的R-CD溶液，在40°C下，用R-CD敏化TiO2电极2小时，得到了这些参数。

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来源期刊

Optical and Quantum Electronics 工程技术-工程：电子与电气

CiteScore

4.60

自引率

20.00%

发文量

810

审稿时长

3.8 months

期刊介绍： Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest. Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.