S-shaped current-voltage characteristics of organic solar devices

Article

关键词: CHARGE-LIMITED-CURRENTS;    OPEN-CIRCUIT VOLTAGE;    POLYMER;    CELLS;    RECOMBINATION;    INJECTION;    TRANSPORT;    ENERGY;   

DOI  :  10.1103/PhysRevB.82.115306

来源: SCIE

【 摘 要 】

Measuring the current-voltage characteristic of organic bulk heterojunction solar devices sometimes reveals an S-shaped deformation. We qualitatively produce this behavior by a numerical device simulation assuming a reduced surface recombination. Furthermore we show how to experimentally create these double diodes by applying an oxygen plasma etch on the indium-tin-oxide anode. Restricted charge transport over material interfaces accumulates space charges and therefore creates S-shaped deformations. Finally we discuss the consequences of our findings for the open-circuit voltage V-oc.

【 授权许可】

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