Abstract
Graphdiyne, a novel large π-conjugated carbon hole transporting material, is employed as anode buffer layer in colloidal quantum dots solar cells. Power conversion efficiency is notably enhanced to 10.64% from 9.49% compared to relevant reference devices. Hole transfer from the quantum dot solid active layer to the anode can be appreciably enhanced only by using graphdiyne to lower the work function of the colloidal quantum dot solid. It is found that the all-carbon buffer layer prolongs the carrier lifetime, reducing surface recombination on the previously neglected back side of the photovoltaic device. Remarkably, the device also shows high long-term stability in ambient air. The results demonstrate that graphdiyne may have diverse applications in enhancing optoelectronic devices.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5284-5289 |
| Number of pages | 6 |
| Journal | Advanced Functional Materials |
| Volume | 26 |
| Issue number | 29 |
| DOIs | |
| State | Published - Aug 2 2016 |
Funding
Z.J. and M.Y. contributed equally to this work. The authors acknowledge the financial support by 973 Program (Grant Nos. 2014CB643600, 2014CB643503, and 2011CB932304), National Natural Science Foundation of China (61405208), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB12030200), and the CAS/SAFEA International Partnership Program for Creative Research Teams.
Keywords
- anode buffer layer
- graphdiyne
- quantum dot solar cells
- recombination
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- General Chemistry
- Condensed Matter Physics
- General Materials Science
- Electrochemistry
- Biomaterials
