Carbon nanotubes as an efficient hole collector for high voltage methylammonium lead bromide perovskite solar cells

Zhen Li; Pablo P Boix; Guichuan Xing; Kunwu Fu; Sneha A Kulkarni; Sudip K Batabyal; Wenjing Xu; Anyuan Cao; Tze Chien Sum; Nripan Mathews; Lydia Helena Wong

doi:10.1039/c5nr06177f

Carbon nanotubes as an efficient hole collector for high voltage methylammonium lead bromide perovskite solar cells

Nanoscale. 2016 Mar 28;8(12):6352-60. doi: 10.1039/c5nr06177f.

Authors

Affiliations

¹ Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, Techno Plaza, 50 Nanyang Drive, 637553, Singapore. lydiaWong@ntu.edu.sg.
² Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore.
³ Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, Techno Plaza, 50 Nanyang Drive, 637553, Singapore. lydiaWong@ntu.edu.sg and School of Materials Science and Engineering, Nanyang Technological University (NTU), Block N4.1, Nanyang Avenue, 639798, Singapore.
⁴ Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, People's Republic of China.
⁵ Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, Techno Plaza, 50 Nanyang Drive, 637553, Singapore. lydiaWong@ntu.edu.sg and School of Materials Science and Engineering, Nanyang Technological University (NTU), Block N4.1, Nanyang Avenue, 639798, Singapore and Singapore-Berkeley Research Initiative for Sustainable Energy, 1 Create Way, 138602, Singapore.

PMID: 26646241
DOI: 10.1039/c5nr06177f

Abstract

A high open circuit voltage (V(OC)) close to 1.4 V under AM 1.5, 100 mW cm(-2) conditions is achieved when carbon nanotubes (CNTs) are used as a hole conductor in methyl ammonium lead bromide (MAPbBr3) perovskite solar cells. Time-resolved photoluminescence and impedance spectroscopy investigations suggest that the observed high V(OC) is a result of the better charge extraction and lower recombination of the CNT hole conductor. Tandem solar cells with all perovskite absorbers are demonstrated with a MAPbBr3/CNT top cell and a MAPbI3 bottom cell, achieving a V(OC) of 2.24 V in series connection. The semitransparent and high voltage MAPbBr3/CNT solar cells show great potential for applications in solar cell windows, tandem solar cells and solar driven water splitting.

Publication types

Research Support, Non-U.S. Gov't