期刊
SOLAR ENERGY
卷 185, 期 -, 页码 1-12出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2019.03.093
关键词
Organic solar cells; Co-additives; Well-distributed photoactive layer; Fullerene system; Non-fullerene system; Stability
资金
- New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry & Energy (MI, Korea) [20153010140030]
- Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry & Energy, Republic of Korea [20174010201540]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Konkuk University Researcher Fund in 2017
- Korea Evaluation Institute of Industrial Technology (KEIT) [20153010140030] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We fabricated organic solar cells (OSCs) based on bulk-heterojunction photoactive layers with fullerene (PTB7:PC71BM) and non-fullerene (PBDB-T:ITIC) systems by introducing 1,8-diiodooctane (DIO) and 4-fluorobenzaldehyde (4-FBA) as co-additives, respectively. Introduction of the co-additives led to a uniform surface morphology of photoactive layer and formed well distributed interpenetrating networks between donors and acceptors. Carrier recombination were reduced due to the favorable structure for charge transport. Consequently, the devices with co-additives achieved an enhanced performance with a PCE of 8.5% (J(sc) = 16.4 mA/cm(2) and FF = 68.3%) in the fullerene system, and a PCE of 10.1% (J(sc) = 16.9 mA/cm(2) and FF = 67.8%) in the non-fullerene system. In addition, the devices with co-additives showed improved stabilities compared to those with single additives. Correspondingly, the reduction ratio of PCE at ambient atmosphere conditions decreased from 17.07% to 10.59% in the fullerene system, and 34.02% to 24.75% in the non-fullerene system.
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