Hexagonal β-NaYF4:Yb(3+), Er(3+) Nanoprism-Incorporated Upconverting Layer in Perovskite Solar Cells for Near-Infrared Sunlight Harvesting

Jongmin Roh; Haejun Yu; Jyongsik Jang

doi:10.1021/acsami.6b04760

Hexagonal β-NaYF4:Yb(3+), Er(3+) Nanoprism-Incorporated Upconverting Layer in Perovskite Solar Cells for Near-Infrared Sunlight Harvesting

ACS Appl Mater Interfaces. 2016 Aug 10;8(31):19847-52. doi: 10.1021/acsami.6b04760. Epub 2016 Aug 1.

Authors

Jongmin Roh¹, Haejun Yu¹, Jyongsik Jang¹

Affiliation

¹ School of Chemical and Biological Engineering, College of Engineering, Seoul National University , 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea.

PMID: 27472304
DOI: 10.1021/acsami.6b04760

Abstract

Hexagonal β-NaYF4:Yb(3+), Er(3+) nanoprisms, successfully prepared using a hydrothermal method, were incorporated into CH3NH3PbI3 perovskite solar cells (PSCs) as an upconverting mesoporous layer. Due to their near-infrared (NIR) sunlight harvesting, the PSCs based on the upconverting mesoporous layer exhibited a power conversion efficiency of 16.0%, an increase of 13.7% compared with conventional TiO2 nanoparticle-based PSCs (14.1%). This result suggests that the hexagonal β-NaYF4:Yb(3+), Er(3+) nanoprisms expand the absorption range of the PSC via upconversion photoluminescence, leading to an enhancement of the photocurrent.

Keywords: Er3+; NaYF4:Yb3+; nanoprism; perovskite solar cell; upconversion.