One-Pot Large-Scale Synthesis of Carbon Quantum Dots: Efficient Cathode Interlayers for Polymer Solar Cells
| Autor: | Xudong Chen, Yuguang Ma, Zhenguo Chi, Xiaofeng Lin, Zhongke Yuan, Wenlang Li, Dingshan Yu, Fangyan Xie, Jiemei Ou, Wei Hong, Yuzhao Yang |
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| Rok vydání: | 2017 |
| Předmět: |
Photocurrent
Materials science business.industry Energy conversion efficiency Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Polymer solar cell Cathode 0104 chemical sciences law.invention law Optoelectronics General Materials Science Quantum efficiency Work function 0210 nano-technology business Visible spectrum Ultraviolet photoelectron spectroscopy |
| Zdroj: | ACS Applied Materials & Interfaces. 9:14953-14959 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Cathode interlayers (CILs) with low-cost, low-toxicity, and excellent cathode modification ability are necessary for the large-scale industrialization of polymer solar cells (PSCs). In this contribution, we demonstrated one-pot synthesized carbon quantum dots (C-dots) with high production to serve as efficient CIL for inverted PSCs. The C-dots were synthesized by a facile, economical microwave pyrolysis in a household microwave oven within 7 min. Ultraviolet photoelectron spectroscopy (UPS) studies showed that the C-dots possessed the ability to form a dipole at the interface, resulting in the decrease of the work function (WF) of cathode. External quantum efficiency (EQE) measurements and 2D excitation-emission topographical maps revealed that the C-dots down-shifted the high energy near-ultraviolet light to low energy visible light to generate more photocurrent. Remarkably improvement of power conversion efficiency (PCE) was attained by incorporation of C-dots as CIL. The PCE was boosted up from 4.14% to 8.13% with C-dots as CIL, which is one of the best efficiency for i-PSCs used carbon based materials as interlayers. These results demonstrated that C-dots can be a potential candidate for future low cost and large area PSCs producing. |
| Databáze: | OpenAIRE |
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