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Optimizing the morphology of all-polymer solar cells for enhanced photovoltaic performance and thermal stability
- Source :
- Journal of Semiconductors. 44:052201
- Publication Year :
- 2023
- Publisher :
- IOP Publishing, 2023.
-
Abstract
- Due to the complicated film formation kinetics, morphology control remains a major challenge for the development of efficient and stable all-polymer solar cells (all-PSCs). To overcome this obstacle, the sequential deposition method is used to fabricate the photoactive layers of all-PSCs comprising a polymer donor PTzBI-oF and a polymer acceptor PS1. The film morphology can be manipulated by incorporating amounts of a dibenzyl ether additive into the PS1 layer. Detailed morphology investigations by grazing incidence wide-angle X-ray scattering and a transmission electron microscope reveal that the combination merits of sequential deposition and DBE additive can render favorable crystalline properties as well as phase separation for PTzBI-oF:PS1 blends. Consequently, the optimized all-PSCs delivered an enhanced power conversion efficiency (PCE) of 15.21% along with improved carrier extraction and suppressed charge recombination. More importantly, the optimized all-PSCs remain over 90% of their initial PCEs under continuous thermal stress at 65 °C for over 500 h. This work validates that control over microstructure morphology via a sequential deposition process is a promising strategy for fabricating highly efficient and stable all-PSCs.
Details
- ISSN :
- 20586140 and 16744926
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Journal of Semiconductors
- Accession number :
- edsair.doi...........bcf6acc7ffe61168b1ec4d9d702890e8