Exploring cyclometalated Ir complexes as donor materials for organic solar cells

Tyler B. Fleetham, Zixing Wang, Jian Li

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The performance of small molecular organic photovoltaic materials is typically limited by their low exciton diffusion lengths, poor solubility, and poor energy level alignment with fullerenes so that the design and synthesis of new materials remain a top priority. To overcome these limitations, we explored the use of an iridium complex as a donor material with the potential for compatibility with solution processing, long exciton diffusion length and easy molecular modification for tunable optical or electrical properties. A bilayer device with a cyclometalated iridium complex and C60 resulted in a power conversion efficiency as high as 2.8%. Furthermore, a VOC of 1 V was achieved in the bilayer device despite an estimated exciton energy of only 1.55 eV, and the device showed minimal temperature and light intensity dependence.

Original languageEnglish (US)
Pages (from-to)7338-7343
Number of pages6
JournalInorganic Chemistry
Volume52
Issue number13
DOIs
StatePublished - Jul 1 2013

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donor materials
Iridium
solar cells
excitons
diffusion length
iridium
Fullerenes
volatile organic compounds
Volatile organic compounds
Electron energy levels
compatibility
luminous intensity
Conversion efficiency
fullerenes
Electric properties
solubility
Optical properties
Solubility
energy levels
electrical properties

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Exploring cyclometalated Ir complexes as donor materials for organic solar cells. / Fleetham, Tyler B.; Wang, Zixing; Li, Jian.

In: Inorganic Chemistry, Vol. 52, No. 13, 01.07.2013, p. 7338-7343.

Research output: Contribution to journalArticle

Fleetham, Tyler B. ; Wang, Zixing ; Li, Jian. / Exploring cyclometalated Ir complexes as donor materials for organic solar cells. In: Inorganic Chemistry. 2013 ; Vol. 52, No. 13. pp. 7338-7343.
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