Jump to main content
Jump to site search


Low-cost synthesis of heterocyclic spiro-type hole transporting materials for perovskite solar cell applications

Author affiliations

Abstract

Four heterocyclic spiro-type hole transporting materials (HTMs) carrying a spiro[fluorene-9,9′-xanthene] (SFX) (SFX-TPAM and SFX-TPA) or spiro[fluorene-9,9′-thioxanthene] (SFT) unit (SFT-TPAM and SFT-TPA) were synthesized through a low-cost facile route with high yields for perovskite solar cell (PSC) applications. In terms of absorption, these four compounds in the film state are all transparent at wavelengths longer than 430 nm, which is beneficial for allowing visible light to reach the perovskite active layer without being absorbed by the hole transporting layer (HTL). The photovoltaic performance of the inverted PSCs based on these small molecular HTMs with the device architecture of glass/ITO/HTL/CH3NH3PbI3/C60/BCP/Ag was tested. Only SFX-TPAM had its highest occupied molecular orbital (HOMO) level matched with the valence band of CH3NH3PbI3. The inverted PSC based on a dopant-free SFX-TPAM HTL achieves a power conversion efficiency of 10.23% under the illumination of standard one sun lighting, which is better than that (8.17%) of the cell based on dopant-free spiro-OMeTAD. The better photovoltaic performance of SFX-TPAM compared to spiro-OMeTAD may be due to the MAPbI3 film deposited on it having better quality. These results indicate that the facilely synthesized, low-cost SFX based small molecules can be used as the HTMs for PSCs.

Graphical abstract: Low-cost synthesis of heterocyclic spiro-type hole transporting materials for perovskite solar cell applications

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Mar 2018, accepted on 02 Apr 2018 and first published on 03 Apr 2018


Article type: Paper
DOI: 10.1039/C8NJ01082J
Citation: New J. Chem., 2018, Advance Article
  •   Request permissions

    Low-cost synthesis of heterocyclic spiro-type hole transporting materials for perovskite solar cell applications

    V. Govindan, K. Yang, Y. Fu and C. Wu, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ01082J

Search articles by author

Spotlight

Advertisements