Nghiên cứu chế tạo chấm lượng tử graphene ứng dụng làm lớp truyền lỗ trống trong pin mặt trời hữu cơ=The research and fabrication of graphene quantum dots applied as the hole transporting layer in polymer solar cells

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Tác giả: Thị Thu Hoàng, Trần Mỹ Hòa Huỳnh, Thụy Thanh Giang Lê, Hoàng Hưng Nguyễn, Hoài Phương Phạm, Quang Trung Trần

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Thông tin xuất bản: Tạp chí Phát triển Khoa học & Công nghệ: Chuyên san Khoa học Tự nhiên, 2018

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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.Trong bài báo này chúng tôi đã nghiên cứu và chế tạo chấm lượng tử graphene (GQDs) bằng phương pháp Hummer cải tiến kết hợp khử NH3. Đường kính chấm lượng tử thu được khoảng 6 nm, được ứng dụng làm lớp truyền lỗ trống trong pin mặt trời hữu cơ, nhằm tăng hiệu suất lượng tử của pin mặt trời. GQDs thân thiện với môi trường, được chế tạo ở nhiệt độ thấp, có thể cô cạn thành dạng bột và hòa tan tốt trong các dung môi phân cực. Chấm lượng tử graphene với cấu trúc không chiều (0D) có công thoát phù hợp với vật liệu polymer dẫn đã làm tăng dòng đoản mạch (từ 2,41 mA/cm2 lên 4,38 mA/cm2 ) cho pin mặt trời chuyển tiếp dị thể làm tăng hiệu suất so với cấu trúc pin truyền thống.

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