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. 2016 Aug 26;5(8):e16137. doi: 10.1038/lsa.2016.137

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Copyright © 2016 CIOMP

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(a) CE as well as PE for W4. Inset: the spectrum of W4 (1000 cd m^–2). (b) J-voltage characteristic for hole-only devices. (c) J-voltage characteristic for electron-only devices.