Antisolvent treatment of copper(i ) thiocyanate (CuSCN) hole transport layer for efficiency improvements in organic solar cells and light-emitting diodes
| Autor: | Pimpisut Worakajit, Akinori Saeki, Vinich Promarak, Taweesak Sudyoadsuk, Pichaya Pattanasattayavong |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Organic solar cell Thiocyanate Energy conversion efficiency 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Copper(I) thiocyanate chemistry Chemical engineering law Materials Chemistry OLED Quantum efficiency 0210 nano-technology Tetrahydrofuran Light-emitting diode |
| Zdroj: | Journal of Materials Chemistry C. 9:10435-10442 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/d1tc02897a |
| Popis: | Copper(I) thiocyanate (CuSCN) has been widely used as a hole-transport layer in organic optoelectronic devices. However, being a coordination polymer, its solution-processing is not straightforward; the typical process requires sulfide-based solvents that strongly interact with Cu(I). Herein, we show that a simple step of washing the CuSCN HTL with antisolvents, specifically acetone (Ace) or tetrahydrofuran (THF), can significantly increase the short-circuit current (Jsc) and fill factor (FF) of organic photovoltaic (OPV) cells. The treatment leads to an increase in the average power conversion efficiency (PCE) from 8.18% for OPV devices based on untreated CuSCN to 9.16% and 9.25% for cells based on Ace- and THF-treated CuSCN HTL, respectively. Furthermore, for organic light-emitting diodes (OLEDs) based on CuSCN HTL, the treatment by THF also increases the external quantum efficiency (EQE) from 5.2% to 8.2%. The facile antisolvent treatment can be readily applied to the solution-processing of CuSCN which is already employed in various organic optoelectronic devices. |
| Databáze: | OpenAIRE |
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