Full text

Turn on search term navigation

© 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the "License"). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Although power conversion efficiency (PCE) of solar cells (SCs) continues to improve, they are still far from practical application because of their complex synthesis process, high cost and inferior operational stability. Carbon quantum dots with high material stability and remarkable photoluminescence are successfully used in light‐emitting diodes. A good light emitter should also be an efficient SC according to the photon balance in Shockley–Quieisser formulation, in which all excitons are ultimately separated. However, the finite quantum‐sized sp2 domain leads to tight exciton bonding, and highly delocalized electron clouds in irregular molecular stacks form disordered charge transfer, resulting in severe energy loss. Herein, an axially growing carbon quantum ribbon (AG‐CQR) with a wide optical absorption range of 440–850 nm is reported. Structural and computational studies reveal that AG‐CQRs (aspect ratio ≈2:1) with carbonyl groups at both ends regulate energy level and efficiently separate excitons. The stacking‐controlled two‐dimensional AG‐CQR film further directionally transfers electrons and holes, particularly in AB stacking mode. Using this film as active layer alone, the SCs yield a maximum PCE of 1.22%, impressive long‐term operational stability of 380 h, and repeatability. This study opens the door for the development of new‐generation carbon‐nanomaterial‐based SCs for practical applications.

Details

Title
Axially Growing Carbon Quantum Ribbon with 2D Stacking Control for High‐Stability Solar Cell
Author
Shi, Yuxin 1 ; Gong, Yongshuai 2 ; Zhang, Yang 1 ; Li, Yunchao 1 ; Li, Xiaohong 1 ; Tan, Zhan'ao 2 ; Fan, Louzhen 1 

 Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, China 
 Beijing Advanced Innovation Center for Soft Matter Science and Engineering Department, Beijing University of Chemical Technology Institution, Beijing, China 
Section
Research Article
Publication year
2024
Publication date
Sep 1, 2024
Publisher
John Wiley & Sons, Inc.
e-ISSN
21983844
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3109646604
Copyright
© 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the "License"). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.