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Millenniums‐old natural dye indigo ‐ a “new” ambipolar organic semiconductor. Indigo shows balanced electron and hole mobilities of 1 × 10−2 cm2 V−1 s−1 and good stability against degradation in air. Inverters with gains of 105 in the first and 110 in the third quadrant are demonstrated. Fabricated entirely from natural and biodegradable compounds, these devices show the large potential of such materials...
The cover shows a stylized electronic circuit in the shape of an indigo molecule embedded in an elastomer. Originally extracted from plants of the Indigofera genus more than 4000 years ago, indigo is nowadays the most industrially produced pigment. On page 375, Mihai Irimia‐Vladu and co‐workers present a new perspective this molecule brings to the field of organic electronics: long‐range order, stability...
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