Colloidal Quantum Dot:Organic Ternary Ink for Efficient Solution-Processed Hybrid Solar Cells

The fabrication of heterostructures via solution process is one of the essential technologies for realizing efficient advanced-generation optoelectronics. Hybrid structures comprising colloidal quantum dots (CQD) and organic semiconducting molecules are garnering considerable research interest becau...

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Bibliographic Details
Published in:International journal of energy research 2023-02, Vol.2023, p.1-14
Main Authors: Jeong, Hoon-Seok, Kim, Dongeon, Jee, Seungin, Si, Min-Jae, Kim, Changjo, Lee, Jung-Yong, Jung, Yujin, Baek, Se-Woong
Format: Article
Language:English
Subjects:
Benzoic acid
Charge efficiency
Chlorobenzene
Colloiding
Efficiency
Electrical properties
Energy
Energy conversion efficiency
Fabrication
Heterostructures
Hybrid structures
Ligands
Morphology
Optical properties
Optoelectronics
Photovoltaic cells
Physical properties
Polymers
Quantum dots
Solar cells
Solvents
Spectrum analysis
Spin coating
Thin films
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Summary:The fabrication of heterostructures via solution process is one of the essential technologies for realizing efficient advanced-generation optoelectronics. Hybrid structures comprising colloidal quantum dots (CQD) and organic semiconducting molecules are garnering considerable research interest because of their complementing optical and electrical properties. However, blending both the materials and forming a stable electronic ink are a challenge owing to the solubility mismatch. Herein, a CQD:organic ternary-blended hybrid solar ink is devised, and efficient hybrid solar cells are demonstrated via single-step spin coating under ambient conditions. Specifically, the passivation of the benzoic acid ligand on the CQD surface enables the dissolution in low-polar solvent such as chlorobenzene, which yields a stable CQD:organic hybrid ink. The hybrid ink facilitates the formation of favorable thin-film morphologies and, consequently, improves the charge extraction efficiency of the solar cells. The resulting hybrid solar cells exhibit a power conversion efficiency of 15.24% that is the highest performance among all existing air-processed CQD:organic hybrid solar cells.
ISSN:0363-907X
1099-114X
DOI:10.1155/2023/4911750