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The image features a polymer solar cell with a graphene oxide (GO) hole‐extraction layer and a GO–Cs electron‐extraction layer to efficiently convert solar light into electricity at low cost. By tuning the GO work function through charge neutralization of its carboxylic acid groups to afford GO–Cs, a single material system is demonstrated as both hole‐ and electron‐extractio layers for high‐performance...
By charge neutralization of carboxylic acid groups in graphene oxide (GO) with Cs2CO3 to afford Cesium‐neutralized GO (GO‐Cs), GO derivatives with appropriate modification are used as both hole‐ and electron‐extraction layers for bulk heterojunction (BHJ) solar cells. The normal and inverted devices based on GO hole‐ and GO‐Cs electron‐extraction layers both outperform the corresponding standard BHJ...
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