Issue 25, 2024

High-efficiency ultrathin flexible organic solar cells with a bilayer hole transport layer

Abstract

The storage stability and mechanical durability are two key parameters for the application of flexible organic solar cells (OSCs), which are considered a promising power source for wearable electronics. However, most of the high-efficiency flexible OSCs are fabricated based on the poly(3,4-ethylenedioxythiophene):poly(styrene–sulfonate) (PEDOT:PSS) hole transport layer, which hinders the long-term operation, especially under cyclic bending or stretching. Herein, we develop an ultrathin flexible OSC (with a total thickness of less than 1.5 μm) based on the bilayer hole transport layer, incorporating a MoO3 interlayer between PEDOT:PSS and ITO, which can simultaneously improve the efficiency, storage stability and mechanical stability of ultrathin flexible OSCs. The ultrathin OSC based on the bilayer HTL achieves a power conversion efficiency (PCE) of 17.0% and a power-per-weight ratio of 39.3 W g−1, compared to single-layer HTL devices with a PCE of 16.4%. To the best of our knowledge, this is one of the highest efficiencies among all ITO-based ultrathin OSCs. Furthermore, the best-performing ultrathin OSCs show PCE retentions of 89.1% and 84.4% after 1000 cycles of bending (with a bending radius of 1 mm) and 1000 cycles of compression–stretching tests, respectively.

Graphical abstract: High-efficiency ultrathin flexible organic solar cells with a bilayer hole transport layer

Supplementary files

Article information

Article type
Paper
Submitted
12 Mar 2024
Accepted
07 May 2024
First published
08 May 2024

J. Mater. Chem. A, 2024,12, 15099-15105

High-efficiency ultrathin flexible organic solar cells with a bilayer hole transport layer

D. Zhang, Y. Ji, Y. Cheng, X. Liu, Z. Xia, X. Liu, X. Liu, X. Yang and W. Huang, J. Mater. Chem. A, 2024, 12, 15099 DOI: 10.1039/D4TA01679C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements