中科院化学所制备出光伏效率超过 20% 的叠层有机光伏电池

3 月 3 日消息，有机光伏电池具有低成本、易于大面积制备的特点。据中国科学院网站，中科院化学所制备出光伏效率超过 20% 的叠层有机光伏电池，相关成果发表在《焦耳》上。

▲ 利用电子束蒸发法制备的隧道结制备效率为 20.2% 的叠层有机太阳能电池

近期，中国科学院化学研究所高分子物理与化学实验室研究员侯剑辉课题组发现，在电子束蒸发二氧化钛的过程中，金红石相的二氧化钛可转化为非晶态薄膜。该薄膜不仅均匀致密，还具有较好的耐酸性。因此，聚（3,4-乙烯二氧噻吩）: 聚苯乙烯磺酸（PEDOTSS）可通过溶液法在其表面形成光滑、致密的薄膜。

进一步，课题组通过精确控制补氧速率，有效调节了沉积物的化学组成、电子能级、相对介电常数和掺杂密度。在最佳条件下，基于 e-TiO1.76/PEDOTSS 隧道结的叠层有机太阳能电池的光伏效率超过了 20%。

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