Issue 72, 2016

Role of LiTFSI in high Tg triphenylamine-based hole transporting material in perovskite solar cell

Abstract

A hole transporting material based on triphenylamine with a high glass transition temperature (Tg) of 99 °C, coded as BT41, was synthesized and applied to a perovskite solar cell. The pristine BT41 showed a low power conversion efficiency (PCE) of 1.1% due to a low photocurrent density (Jsc) of ca. 6 mA cm−2 and an almost negligible fill factor of less than 0.2, which was significantly improved to 9.0%, however, owing mainly to the 3-fold improved Jsc of 17.6 mA cm−2, by adding both tert-butylpyridine (tBP) and lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) as additives. The oxidation of BT41 was dominated by LiTFSI, which was responsible for the hole mobility increasing by one order of magnitude. The addition of the additive also reduced the recombination resistance, which correlates with the higher fill factor. Although both additives in BT41 contributed cooperatively to the improvement of the photovoltaic performance, LiTFSI played the major role in the enhancement.

Graphical abstract: Role of LiTFSI in high Tg triphenylamine-based hole transporting material in perovskite solar cell

Article information

Article type
Paper
Submitted
14 May 2016
Accepted
27 Jun 2016
First published
29 Jun 2016

RSC Adv., 2016,6, 68553-68559

Role of LiTFSI in high Tg triphenylamine-based hole transporting material in perovskite solar cell

A. Cho, H. Kim, T. Bui, X. Sallenave, F. Goubard and N. Park, RSC Adv., 2016, 6, 68553 DOI: 10.1039/C6RA12574C

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