Jump to main content
Jump to site search

Issue 16, 2018
Previous Article Next Article

Extremely low trap-state energy level perovskite solar cells passivated using NH2-POSS with improved efficiency and stability

Author affiliations

Abstract

Both efficiency and stability are two essential performance factors in hybrid halide perovskite solar cells, which are closely related to the ionic defects at the surface and grain boundary of the absorber films. To passivate these defects, we propose a derivative of polyhedral oligomeric silsesquioxane with an amino-group (NH2-POSS) to modify perovskite films. It successfully reduces the charge trap density and trap-state energy level (0.045 eV) as obtained by temperature-dependent admittance measurements, eventually leading to the enhancement of the open-circuit voltage (VOC) and power conversion efficiency (PCE) from 18.1% to 20.5% in the corresponding devices. Moreover, trap passivation also significantly enhances the stability of the devices, wherein the PCE of perovskite solar cells exhibits 20% degradation in a N2 atmosphere for 1000 h. The introduction of NH2-POSS suggests a feasible alternative solution for defect passivation to further improve both the efficiency and intrinsic stability of perovskite solar cells.

Graphical abstract: Extremely low trap-state energy level perovskite solar cells passivated using NH2-POSS with improved efficiency and stability

Back to tab navigation

Supplementary files

Article information


Submitted
29 Dec 2017
Accepted
15 Mar 2018
First published
11 Apr 2018

J. Mater. Chem. A, 2018,6, 6806-6814
Article type
Communication

Extremely low trap-state energy level perovskite solar cells passivated using NH2-POSS with improved efficiency and stability

N. Liu, Q. Du, G. Yin, P. Liu, L. Li, H. Xie, C. Zhu, Y. Li, H. Zhou, W. Zhang and Q. Chen, J. Mater. Chem. A, 2018, 6, 6806
DOI: 10.1039/C7TA11345E

Social activity

Search articles by author

Spotlight

Advertisements