Abstract
In this report, we studied and fabricated graphene quantum dots by improved the Hummer method using NH3 reducing agent. The diameter of graphene quantum dots was approximately 6 nm, applied as the hole transport layer in organic solar cell to improve the quantum efficiency of solar cells. GQDs were very friendly with environment, made at low temperatures and might be dried into powder form and dissolved well in polar solvents. Graphene quantum dots with a 0D structure had the workfunction suistable for the conductive polymer which increased the short current (from 2.41 mA/cm2 to 4.38 mA/cm2) of polymer solar cells. They improved the performance significantly compared to conventional solar cells.
Highlights
Hình thái học của GQDs được đo bằng kính hiển vi điện tử truyền qua (TEM - JEOL JEM 1400)
Dai, "Fewlayered graphene quantum dots as efficient holeextraction layer for high-performance polymer solar cells", Nano Energy, vol 15, 186–192, 2015
Summary
Để so sánh vai trò của lớp truyền lỗ trống trong pin mặt trời hữu cơ chúng tôi chuẩn bị 2 cấu trúc pin như sau: ITO/PEDOT:PSS/. P3HT:PCBM/Al và ITO/PEDOT:PSS/P3HT: PCBM:GQDs/Al. Hai cấu trúc pin này được minh họa trong Hình 2. Cấu trúc pin Organic solarcells (OSC) không sử dụng và có sử dụng GQDs làm lớp truyền lỗ trống
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More From: Science and Technology Development Journal - Natural Sciences
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