Abstract
Solution-processed organic solar cells (OSCs) are a promising candidate for next-generation photovoltaic technologies. However, the short exciton diffusion length of the bulk heterojunction active layer in OSCs strongly hampers the full potential to be realized in these bulk heterojunction OSCs. Herein, we report high-performance OSCs with a pseudo-bilayer architecture, which possesses longer exciton diffusion length benefited from higher film crystallinity. This feature ensures the synergistic advantages of efficient exciton dissociation and charge transport in OSCs with pseudo-bilayer architecture, enabling a higher power conversion efficiency (17.42%) to be achieved compared to those with bulk heterojunction architecture (16.44%) due to higher short-circuit current density and fill factor. A certified efficiency of 16.31% is also achieved for the ternary OSC with a pseudo-bilayer active layer. Our results demonstrate the excellent potential for pseudo-bilayer architecture to be used for future OSC applications.
| Original language | English |
|---|---|
| Article number | 468 |
| Journal | Nature Communications |
| Volume | 12 |
| Issue number | 1 |
| Early online date | 20 Jan 2021 |
| DOIs | |
| Publication status | Published - 1 Dec 2021 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021, The Author(s).
Funding
A.J. and Z.Z. thank the APRC Grant of the City University of Hong Kong (9380086, 9610421), Innovation and Technology Fund (ITS/497/18FP, GHP/021/18SZ), the Office of Naval Research (N000142012191), the ECS grant (21301319) from the Research Grants Council of Hong Kong, Natural Science Foundation of Guangdong Province (2019A1515010761), Guangdong Major Project of Basic and Applied Basic Research (No. 2019B030302007), and Guangdong-Hong Kong-Macao joint laboratory of optoelectronic and magnetic functional materials (No. 2019B121205002). Z.P. and H.A. were supported by ONR grants N000141712204 and N000142012155. X-ray data were acquired at beamlines 7.3.3 and 11.0.1.2 at the Advanced Light Source, LBNL, which is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
