Issue 11, 2018

Largely enhanced VOC and stability in perovskite solar cells with modified energy match by coupled 2D interlayers

Abstract

Due to the use of a low-temperature solution process and the absence of hysteresis, PEDOT:PSS based p–i–n perovskite solar cells (PVSCs) have some obvious advantages, such as simple device technology, suitability for flexible and large size substrates, and long-term stability. However, so far their power conversion efficiency (PCE) has been much lower than that of other types of PVSCs, and in particular, they have a much lower open-circuit voltage (VOC). In this research, PEDOT:PSS based PVSCs achieve a large enhancement of VOC, PCE and device stability by using 2D materials like graphene oxide (GO) and MoS2 as interfacial layers. The CH3NH3PbI3 based PVSC with the GO and MoS2 layers shows an increased VOC from 0.962 to 1.135 V and an enhanced PCE from 14.15% to 19.14%. When a Br-doped perovskite of CH3NH3PbI2.5Br0.5 is used as the active layer, the VOC is enhanced from 1.010 to 1.176 V. The modified energy match at electrode interfaces plays a key role in the enhancement of device performance. This work indicates that 2D materials are important materials for use in interfaces of perovskite solar cells to largely enhance device performance and stability.

Graphical abstract: Largely enhanced VOC and stability in perovskite solar cells with modified energy match by coupled 2D interlayers

Supplementary files

Article information

Article type
Paper
Submitted
27 Dec 2017
Accepted
12 Feb 2018
First published
14 Feb 2018

J. Mater. Chem. A, 2018,6, 4860-4867

Largely enhanced VOC and stability in perovskite solar cells with modified energy match by coupled 2D interlayers

Y. Wang, S. Wang, X. Chen, Z. Li, J. Wang, T. Li and X. Deng, J. Mater. Chem. A, 2018, 6, 4860 DOI: 10.1039/C7TA11295E

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