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Air‐Stable Organic Solar Cells Using an Iodine‐Free Solvent Additive
Author(s) -
Lee Seongyu,
Kong Jaemin,
Lee Kwanghee
Publication year - 2016
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201600970
Subject(s) - fullerene , iodide , iodine , materials science , solvent , degradation (telecommunications) , reagent , polymer , chemical engineering , organic chemistry , computer science , chemistry , composite material , telecommunications , engineering , metallurgy
It is observed that degradation of organic bulk heterojunction is directly associated with degradation of solvent additive, 1,8‐diiodooctane. The iodide impurities released from 1,8‐diiodooctane react with fullerenes, making fullerene‐iodide intermediate compounds which lead to fullerene oxidation and efficiency drop, irrespective of photooxidation of polymer in polymer/fullerene bulk heterojunctions. Replacing the additive with an iodine‐free reagent significantly elongates a device lifetime.