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Solution-processed MoO3:PEDOT:PSS hybrid hole transporting layer for inverted polymer solar cells
Yiling Wang1,2, Qun Luo1, Na Wu1
1†Printable Electronics Research Center, Suzhou Institute of Nano-Tech and Nano-Bionic, Chinese Academy of Sciences, Suzhou, 215123, P. R. China.
ACS Applied Materials & Interfaces
|March 21, 2015
Summary
Solution-processed hybrid molybdenum trioxide (MoO3) and PEDOT:PSS inks create efficient hole transporting layers (HTLs) for organic solar cells. This advancement offers improved performance and compatibility with roll-to-roll manufacturing.
Area of Science:
- Materials Science
- Organic Electronics
- Nanotechnology
Background:
- Organic solar cells (OSCs) require efficient hole transporting layers (HTLs) for optimal performance.
- Traditional HTLs often involve complex processing or material limitations.
- Developing solution-processable HTLs is crucial for cost-effective OSC fabrication.
Purpose of the Study:
- To develop a novel solution-processed hybrid hole transporting layer (HTL) for inverted organic solar cells.
- To investigate the structural and morphological properties of the MoO3:PEDOT:PSS hybrid ink.
- To evaluate the photovoltaic performance and stability of organic solar cells utilizing the hybrid HTL.
Main Methods:
- Preparation of hybrid MoO3:PEDOT:PSS inks by simple mixing of MoO3 nanoparticles and PEDOT:PSS.
- Characterization of the core-shell structure and surface morphology of the hybrid ink.
- Fabrication and testing of inverted organic solar cells with the hybrid HTL.
- Analysis of the influence of MoO3:PEDOT:PSS blend ratio on device performance and stability.
Main Results:
- A core-shell structure was observed in the MoO3:PEDOT:PSS hybrid ink, enhancing film formation and adhesion.
- Inverted organic solar cells with the hybrid HTL achieved high power conversion efficiencies (PCEs) of 3.29% and 5.92% for P3HT:PC61BM and PTB7:PC61BM devices, respectively.
- The hybrid HTL exhibited less thickness dependence and improved compatibility with roll-to-roll printing.
- Increased MoO3 content improved device stability but slightly decreased PCE.
Conclusions:
- Solution-processed MoO3:PEDOT:PSS hybrid inks serve as effective HTLs for inverted organic solar cells.
- The hybrid HTL offers advantages in processability, performance, and stability compared to traditional methods.
- This development paves the way for scalable and efficient organic photovoltaic devices.
