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Chế tạo tế bào năng lượng mặt trời cảm quang nhuộm hiệu suất cao và tiết kiệm chi phí bằng cách sử dụng nanocomposite ZnO/MWCNT làm photoanode
Tóm tắt
Trong nghiên cứu hiện tại, một cấu hình tiết kiệm chi phí và hiệu quả mới của tế bào năng lượng mặt trời cảm quang nhuộm (DSSC) với composite oxide kẽm–nanotube carbon nhiều lớp (ZnO-MWCNT) đã được chế tạo. Các hạt nanoparticle ZnO được tổng hợp bằng phương pháp hỗ trợ bức xạ vi sóng và sau đó được nghiền với MWCNT đã qua xử lý với axit ở các nồng độ khác nhau. Các nanocomposite ZnO/MWCNT cùng với thuốc nhuộm N719 được sử dụng làm photoanode trong khi Pt được sử dụng làm điện cực đối kháng để chế tạo các thiết bị DSSC. Kết quả XRD xác nhận sự tồn tại của các hạt nanoparticle ZnO nhiều tinh thể, trong khi phân tích SEM và TEM cho thấy sự hình thành đồng nhất của các nanocomposite ZnO/MWCNT với các hạt nanoparticle ZnO có kích thước từ 10 đến 20 nm. Kết quả EDS xác nhận sự hiện diện của Zn, O và C, trong khi FTIR xác nhận các tương tác giữa ZnO và MWCNT. Phân tích quang phổ UV–đối với ánh sáng cho thấy sự giảm năng lượng băng giữa với sự tăng nồng độ MWCNT, trong khi kết quả PL chỉ ra sự ức chế quá trình tái tổ hợp cặp electron–lỗ trống. Các điều tra photovoltaic cho thấy photoanode ZnO/MWCNT (0.5) mang lại hiệu suất chuyển đổi quang điện (PCE) cao là 8.85%, tốt hơn 3.85 lần so với ZnO trống (2.32%). Nghiên cứu về điện hóa cũng tiết lộ rằng điện cực composite thể hiện hoạt động xúc tác cao và thời gian sống electron dài. Hiệu suất chuyển đổi quang điện cao theo kích thước lỗ, hiệu suất chuyển đổi photon tới điện và chất lượng hấp thụ quang đã được thảo luận.
Từ khóa
#tế bào năng lượng mặt trời #cảm quang nhuộm #ZnO #MWCNT #hiệu suất chuyển đổi quang điện #compositeTài liệu tham khảo
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