Morphology-Controlled High-Efficiency Small Molecule Organic Solar Cells without Additive Solvent Treatment.
This paper focuses on nano-morphology-controlled small-molecule organic solar cells without solvent treatment for high power-conversion efficiencies (PCEs). The maximum high PCE reaches up to 7.22% with a bulk-heterojunction (BHJ) thickness of 320 nm. This high efficiency was obtained by eliminating solvent additives such as 1,8-diiodooctane (DIO) to find an alternative way to control the domain sizes in the BHJ layer. Furthermore, the generalized transfer matrix method (GTMM) analysis has been applied to confirm the effects of applying a different thickness of BHJs for organic solar cells from 100 to 320 nm, respectively. Finally, the study showed an alternative way to achieve high PCE organic solar cells without additive solvent treatments to control the morphology of the bulk-heterojunction.
National Photonics Semiconductor Lab, National Photonics Semiconductor Inc., Suwon-Si 17113, Korea. cto.np@npsemi.com.
Il Ku
IK
Kim
School of Information and Communication Technology, Griffith University, Southport QLD 4222, Australia. j.jo@griffith.edu.au.
Jun Hyung
JH
Jo
Nanomaterials Centre, School of Chemical Engineering, University of Queensland, Brisbane QLD 4072, Australia. j.yun1@uq.edu.au.
Jung-Ho
JH
Yun
bulk-heterojunction; optical simulation; organic solar cell; small molecule