Single‐Junction Polymer Solar Cells with 16.35% Efficiency Enabled by a Platinum(II) Complexation Strategy
Top Cited Papers
- 3 June 2019
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 31 (29), e1901872
- https://doi.org/10.1002/adma.201901872
Abstract
A new strategy of platinum(II) complexation is developed to regulate the crystallinity and molecular packing of polynitrogen heterocyclic polymers, optimize the morphology of the active blends, and improve the efficiency of the resulting nonfullerene polymer solar cells (NF‐PSCs). The newly designed s‐tetrazine (s‐TZ)‐containing copolymer of PSFTZ (4,8‐bis(5‐((2‐butyloctyl)thio)‐4‐fluorothiophen‐2‐yl)benzo[1,2‐b:4,5‐b′]dithiophene‐alt‐3,6‐bis(4‐octylthiophen‐2‐yl)‐1,2,4,5‐tetrazine) has a strong aggregation property, which results in serious phase separation and large domains when blending with Y6 ((2,2′‐((2Z,2′Z)‐((12,13‐bis(2‐ethylhexyl)‐3,9‐diundecyl‐12,13‐dihydro‐[1,2,5]thiadiazolo[3,4‐e]thieno[2″,3″:4′,5′]thieno[2′,3′:4,5]pyrrolo[3,2‐g]thieno[2′,3′:4,5]thieno[3,2‐b]indole‐2,10‐diyl)bis(methanylylidene))bis(5,6‐difluoro‐3‐oxo‐2,3‐dihydro‐1H‐indene‐2,1‐diylidene))dimalononitrile)), and produces a power‐conversion efficiency (PCE) of 13.03%. By adding small amount of Pt(Ph)2(DMSO)2 (Ph, phenyl and DMSO, dimethyl sulfoxide), platinum(II) complexation would occur between Pt(Ph)2(DMSO)2 and PSFTZ. The bulky benzene ring on the platinum(II) complex increases the steric hindrance along the polymer main chain, inhibits the polymer aggregation strength, regulates the phase separation, optimizes the morphology, and thus improves the efficiency to 16.35% in the resulting devices. 16.35% is the highest efficiency for single‐junction PSCs reported so far.Keywords
Funding Information
- National Natural Science Foundation of China (21825502, 51573107, 91633301, 21432005)
- State Key Laboratory of Polymer Materials Engineering (2017‐2‐04)
This publication has 47 references indexed in Scilit:
- High‐Performance Organic Solar Cells Based on a Small Molecule with Alkylthio‐Thienyl‐Conjugated Side Chains without Extra TreatmentsAdvanced Materials, 2015
- Flow-enhanced solution printing of all-polymer solar cellsNature Communications, 2015
- Realizing over 10% efficiency in polymer solar cell by device optimizationScience in China Series B Chemistry, 2015
- Aggregation and morphology control enables multiple cases of high-efficiency polymer solar cellsNature Communications, 2014
- Universal Formation of Compositionally Graded Bulk Heterojunction for Efficiency Enhancement in Organic PhotovoltaicsAdvanced Materials, 2014
- Fluorinated Benzothiadiazole-Based Conjugated Polymers for High-Performance Polymer Solar Cells without Any Processing Additives or Post-treatmentsJournal of the American Chemical Society, 2013
- Remove the Residual Additives toward Enhanced Efficiency with Higher Reproducibility in Polymer Solar CellsThe Journal of Physical Chemistry C, 2013
- High‐Efficiency Polymer Solar Cells Enhanced by Solvent TreatmentAdvanced Materials, 2013
- Synthesis, Characterization, and Transistor and Solar Cell Applications of a Naphthobisthiadiazole-Based Semiconducting PolymerJournal of the American Chemical Society, 2012
- Double cyclometallation of bridging 3,6-bis(2-thienyl)-1,2,4,5-tetrazine in a dinuclear mesityl(dimethylsulfoxide)platinum(II) complex: Structure and propertiesJournal of Organometallic Chemistry, 2008