Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface

The energy level alignment at the CH3NH3PbI3/copper phthalocyanine (CuPc) interface is investigated by X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). XPS reveal a 0.3 eV downward band bending in the CuPc film. UPS validate this finding and further reveal neg...

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Main Authors:	Chen, Shi, Goh, Teck Wee, Sabba, Dharani, Chua, Julianto, Mathews, Nripan, Huan, Cheng Hon Alfred, Sum, Tze Chien
Other Authors:	School of Materials Science & Engineering
Format:	Article
Language:	English
Published:	2014
Subjects:	DRNTU::Science::Physics::Atomic physics::Properties of matter and antimatter
Online Access:	https://hdl.handle.net/10356/105899 http://hdl.handle.net/10220/20932
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Institution:	Nanyang Technological University
Language:	English

id	sg-ntu-dr.10356-105899
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spelling	sg-ntu-dr.10356-1058992023-02-28T19:28:03Z Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface Chen, Shi Goh, Teck Wee Sabba, Dharani Chua, Julianto Mathews, Nripan Huan, Cheng Hon Alfred Sum, Tze Chien School of Materials Science & Engineering School of Physical and Mathematical Sciences DRNTU::Science::Physics::Atomic physics::Properties of matter and antimatter The energy level alignment at the CH3NH3PbI3/copper phthalocyanine (CuPc) interface is investigated by X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). XPS reveal a 0.3 eV downward band bending in the CuPc film. UPS validate this finding and further reveal negligible interfacial dipole formation – verifying the viability of vacuum level alignment. The highest occupied molecular orbital of CuPc is found to be closer to the Fermi level than the valance band maximum of CH3NH3PbI3, facilitating hole transfer from CH3NH3PbI3 to CuPc. However, subsequent hole extraction from CuPc may be impeded by the downward band bending in the CuPc layer. Published version 2014-09-19T07:29:36Z 2019-12-06T22:00:21Z 2014-09-19T07:29:36Z 2019-12-06T22:00:21Z 2014 2014 Journal Article Chen, S., Goh, T. W., Sabba, D., Chua, J., Mathews, N., Huan, C. H. A., et al. (2014). Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface. APL materials, 2(8), 081512-. 2166-532X https://hdl.handle.net/10356/105899 http://hdl.handle.net/10220/20932 10.1063/1.4889844 en APL materials © 2014 American Institute of Physics. This paper was published in APL Materials and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4889844]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 9 p. application/pdf
institution	Nanyang Technological University
building	NTU Library
continent	Asia
country	Singapore Singapore
content_provider	NTU Library
collection	DR-NTU
language	English
topic	DRNTU::Science::Physics::Atomic physics::Properties of matter and antimatter
spellingShingle	DRNTU::Science::Physics::Atomic physics::Properties of matter and antimatter Chen, Shi Goh, Teck Wee Sabba, Dharani Chua, Julianto Mathews, Nripan Huan, Cheng Hon Alfred Sum, Tze Chien Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface
description	The energy level alignment at the CH3NH3PbI3/copper phthalocyanine (CuPc) interface is investigated by X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). XPS reveal a 0.3 eV downward band bending in the CuPc film. UPS validate this finding and further reveal negligible interfacial dipole formation – verifying the viability of vacuum level alignment. The highest occupied molecular orbital of CuPc is found to be closer to the Fermi level than the valance band maximum of CH3NH3PbI3, facilitating hole transfer from CH3NH3PbI3 to CuPc. However, subsequent hole extraction from CuPc may be impeded by the downward band bending in the CuPc layer.
author2	School of Materials Science & Engineering
author_facet	School of Materials Science & Engineering Chen, Shi Goh, Teck Wee Sabba, Dharani Chua, Julianto Mathews, Nripan Huan, Cheng Hon Alfred Sum, Tze Chien
format	Article
author	Chen, Shi Goh, Teck Wee Sabba, Dharani Chua, Julianto Mathews, Nripan Huan, Cheng Hon Alfred Sum, Tze Chien
author_sort	Chen, Shi
title	Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface
title_short	Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface
title_full	Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface
title_fullStr	Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface
title_full_unstemmed	Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface
title_sort	energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface
publishDate	2014
url	https://hdl.handle.net/10356/105899 http://hdl.handle.net/10220/20932
_version_	1759856523544100864

Energy level alignment at the methylammonium lead iodide/copper phthalocyanine interface

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