期刊
ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 29, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202201975
关键词
bio-based electrolytes; cellulose; green optoelectronics; ion transporting biopolymer; light-emitting electrochemical cells
类别
资金
- European Union's Horizon 2020 research and innovation FET-OPEN under grant agreement ARTIBLED [863170]
- ERC-Co InOutBioLight [816856]
- MSCA-ITN STiBNite [956923]
- MCIN/AIE [PID2019-109742GB-I00]
- ERDF A way of making Europe
- European Union
- Universidad de La Rioja
- Projekt DEAL
- European Research Council (ERC) [816856] Funding Source: European Research Council (ERC)
This study demonstrates the use of biogenic electrolytes in LECs, showing self-stable and highly performing devices with efficiency enhancement. The biogenic electrolyte does not reduce device performance and provides room for future developments with easy chemical modifications.
Light-emitting electrochemical cells (LECs) are the simplest and cheapest solid-state lighting technology for soft and/or single-use purposes. However, a major concern is a transition toward eco-friendly devices (emitters/electrolytes/electrodes) to meet green optoelectronic requirements without jeopardizing device performance. In this context, this study shows the first biogenic electrolyte applied to LECs, realizing self-stable and highly performing devices with cellulose-based electrolytes combined with archetypical emitters (conjugated polymers or CPs and ionic transition-metal complexes or iTMCs). In contrast to reference devices with traditional electrolytes, self-stability tests (ambient storage/thermal-stress) show that devices with this bio-electrolyte hold film roughness and photoluminescence quantum yields over time. In addition, charge injection is enhanced due to the high dielectric constant, leading to high efficacies of 15 cd A(-1)@3750 cd m(-2) and 2.5 cd A(-1)@600 cd m(-2) associated with stabilities of 3000/7.5 h and 153/0.7 J for CPs/iTMCs-LECs, respectively. They represent four-/twofold enhancement compared to reference devices. Hence, this novel biogenic electrolyte approach does not reduce device performance as in the prior-art bio-degradable polymer and DNA-hybrid electrolytes, while the easiness of chemical modification provides plenty of room for future developments. All-in-all, this study reinforces the relevance of carbohydrate-based electrolytes not only for energy-related applications, but also for a new field in lighting.
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