Universität zu Köln

Oz, Senol, Jena, Ajay Kumar, Kulkarni, Ashish ORCID: 0000-0002-7945-208X, Mouri, Kazuhiro, Yokoyama, Takamichi, Takei, Izuru, Uenlue, Feray, Mathur, Sanjay ORCID: 0000-0003-2765-2693 and Miyasaka, Tsutomu ORCID: 0000-0001-8535-7911 (2020). Lead(II) Propionate Additive and a Dopant-Free Polymer Hole Transport Material for CsPbI2Br Perovskite Solar Cells. ACS Energy Lett., 5 (4). S. 1292 - 1300. WASHINGTON: AMER CHEMICAL SOC. ISSN 2380-8195

Full text not available from this repository.

Abstract

All-inorganic perovskites (CsPbI3 and CsPbI2Br), owing to their greater thermal stability compared to organic-inorganic hybrid perovskites, are becoming popular in perovskite photovoltaics, but the problem that remains with CsPbI2Br (or CsPbI3) is the humidity-assisted phase transformation. Herein, we report on the formation of CsPbI2Br alpha-phase and improvement of its phase stability under ambient atmosphere (20-30% relative humidity) by Pb(II) propionate additive in the CsPbI2Br precursor. Solar cells employing a CsPbI2Br film with an optimum concentration of the additive (1 mol %) and a donor-acceptor type polymer (synthesized by us) as dopant-free hole transport material that has a better energy level matching with CsPbI2Br (compared to other polymers like P3HT, PTAA, and asy-PBTBDT) work with a champion power conversion cell efficiency of 14.58%. A continuous increase in the open-circuit voltage, reaching 1.36 V for 5 mol % Pb(II) propionate, indicates a remarkable defect-passivation effect by the additive.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Oz, Senol UNSPECIFIED UNSPECIFIED UNSPECIFIED Jena, Ajay Kumar UNSPECIFIED UNSPECIFIED UNSPECIFIED Kulkarni, Ashish UNSPECIFIED orcid.org/0000-0002-7945-208X UNSPECIFIED Mouri, Kazuhiro UNSPECIFIED UNSPECIFIED UNSPECIFIED Yokoyama, Takamichi UNSPECIFIED UNSPECIFIED UNSPECIFIED Takei, Izuru UNSPECIFIED UNSPECIFIED UNSPECIFIED Uenlue, Feray UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED orcid.org/0000-0003-2765-2693 UNSPECIFIED Miyasaka, Tsutomu UNSPECIFIED orcid.org/0000-0001-8535-7911 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-337319
DOI:	10.1021/acsenergylett.0c00244
Journal or Publication Title:	ACS Energy Lett.
Volume:	5
Number:	4
Page Range:	S. 1292 - 1300
Date:	2020
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	2380-8195
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HIGHLY EFFICIENT; HALIDE PEROVSKITES; ALPHA-CSPBI3; PHASE; STABILIZATION Multiple languages Chemistry, Physical; Electrochemistry; Energy & Fuels; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/33731