Issue 31, 2019

A dithieno[3,2-b:2′,3′-d]pyrrole-cored four-arm hole transporting material for over 19% efficiency dopant-free perovskite solar cells

Abstract

Dopant-free hole transporting materials (HTMs) have been in the limelight in the quest for stable perovskite solar cells (PVSCs). Herein, we report a novel dopant-free HTM featuring a dithieno[3,2-b:2′,3′-d]pyrrole core flanked with two-fold triphenylamine arm substituted thiophene bridges. This star-shaped molecule shows a suitable ionization potential (5.13 eV), good thermal stability (high glass-transition temperature of 120.3 °C) and a high hole mobility (6.50 × 10−5 cm2 V−1 s−1). The molecule is more hydrophobic than reference spiro-OMeTAD in a film. By capping our dopant-free HTM on the perovskite layer, the fabricated n-i-p device can achieve a maximum power conversion efficiency of 19.42%, which is comparable to the device based on doped spiro-OMeTAD (19.59%). This star-shaped dithieno[3,2-b:2′,3′-d]pyrrole based molecule is thus a promising candidate HTM for upscaling the commercial manufacture of PVSCs.

Graphical abstract: A dithieno[3,2-b:2′,3′-d]pyrrole-cored four-arm hole transporting material for over 19% efficiency dopant-free perovskite solar cells

Supplementary files

Article information

Article type
Communication
Submitted
10 יונ 2019
Accepted
16 יול 2019
First published
16 יול 2019

J. Mater. Chem. C, 2019,7, 9455-9459

A dithieno[3,2-b:2′,3′-d]pyrrole-cored four-arm hole transporting material for over 19% efficiency dopant-free perovskite solar cells

Z. Dong, X. Yin, A. Ali, J. Zhou, S. S. Bista, C. Chen, Y. Yan and W. Tang, J. Mater. Chem. C, 2019, 7, 9455 DOI: 10.1039/C9TC03111A

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