Enhancing Performance of Large‐Area Organic Solar Cells with Thick Film via Ternary Strategy
- 11 April 2017
- Vol. 13 (21)
- https://doi.org/10.1002/smll.201700388
Abstract
Large-scale fabrication of organic solar cells requires an active layer with high thickness tolerability and the use of environment-friendly solvents. Thick films with high-performance can be achieved via a ternary strategy studied herein. The ternary system consists of one polymer donor, one small molecule donor, and one fullerene acceptor. The small molecule enhances the crystallinity and face-on orientation of the active layer, leading to improved thickness tolerability compared with that of a polymer-fullerene binary system. An active layer with 270 nm thickness exhibits an average power conversion efficiency (PCE) of 10.78%, while the PCE is less than 8% with such thick film for binary system. Furthermore, large-area devices are successfully fabricated using polyethylene terephthalate (PET)/Silver gride or indium tin oxide (ITO)-based transparent flexible substrates. The product shows a high PCE of 8.28% with an area of 1.25 cm2 for a single cell and 5.18% for a 20 cm2 module. This study demonstrates that ternary organic solar cells exhibit great potential for large-scale fabrication and future applications.Keywords
Funding Information
- Ministry of Science and Technology (2016YFA0200700)
- National Natural Science Foundation of China (21125420, 21604017, 21504066, 21534003)
- Chinese Academy of Sciences (XDA0909040200)
This publication has 39 references indexed in Scilit:
- Energy‐Level Modulation of Small‐Molecule Electron Acceptors to Achieve over 12% Efficiency in Polymer Solar CellsAdvanced Materials, 2016
- Versatile ternary organic solar cells: a critical reviewEnergy & Environmental Science, 2015
- Status and prospects for ternary organic photovoltaicsNature Photonics, 2015
- Conjugated Polymer–Small Molecule Alloy Leads to High Efficient Ternary Organic Solar CellsJournal of the American Chemical Society, 2015
- Functionalized Graphene as an Electron‐Cascade Acceptor for Air‐Processed Organic Ternary Solar CellsAdvanced Functional Materials, 2015
- Naphtho[1,2-b:5,6-b′]dithiophene Based Two-Dimensional Conjugated Polymers for Highly Efficient Thick-Film Inverted Polymer Solar CellsChemistry of Materials, 2014
- Semi-crystalline photovoltaic polymers with efficiency exceeding 9% in a ∼300 nm thick conventional single-cell deviceEnergy & Environmental Science, 2014
- Efficient ternary blend polymer solar cells with indene-C60 bisadduct as an electron-cascade acceptorEnergy & Environmental Science, 2014
- Naphthodithiophene–Naphthobisthiadiazole Copolymers for Solar Cells: Alkylation Drives the Polymer Backbone Flat and Promotes EfficiencyJournal of the American Chemical Society, 2013
- Efficient Small Bandgap Polymer Solar Cells with High Fill Factors for 300 nm Thick FilmsAdvanced Materials, 2013