Acta Chimica Sinica ›› 2020, Vol. 78 ›› Issue (5): 382-396.DOI: 10.6023/A20020032 Previous Articles     Next Articles



王文璇a,b, 王建邱a, 郑众a, 侯剑辉a,b   

  1. a 中国科学院化学研究所 北京 100190;
    b 中国科学院大学 北京 100049
  • 投稿日期:2020-02-13 发布日期:2020-04-26
  • 通讯作者: 郑众, 侯剑辉;
  • 作者简介:王文璇,南开大学化学学院2016级本科生,于中国科学院化学研究所侯剑辉研究员课题组开展本科毕业设计工作,主要的研究兴趣为具有叠层结构的有机太阳能电池;王建邱,苏州大学与中国科学院化学研究所联合培养博士研究生,主要从事有机太阳能电池的制备与性能研究;郑众,2016年于中国科学院化学研究所高分子物理与化学专业取得理学博士学位.2016年至2019年期间,于东京大学、国家纳米科学中心从事科研工作并晋升副研究员.自2019年7月加入中国科学院化学研究所侯剑辉研究员课题组开展博士后研究.研究方向包括有机光伏器件关键参数解析及过程调制、大面积有机光伏器件性能优化;侯剑辉,博士、研究员、博士生导师、北京科技大学兼职教授.2006年于中国科学院化学研究所取得博士学位.2006年至2008年于美国加州大学洛杉矶分校从事博士后工作.2008年至2010年任美国朔纶公司高级研发主管.2010年于中国科学院化学研究所任研究员.主要研究方向为有机光伏关键材料设计与合成、光伏过程精细解析及有机光伏产业开发.
  • 基金资助:

Research Progress of Tandem Organic Solar Cells

Wang Wenxuana,b, Wang Jianqiua, Zheng Zhonga, Hou Jianhuia,b   

  1. a Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-02-13 Published:2020-04-26
  • Supported by:
    Project supported by the National Natural Science Foundation of China (NSFC) (Nos. 51703041, 91333204, 91633301, 51673201).

Organic solar cells have been developing quite rapidly in the past two decades. Tang fabricated the first organic solar cell with planar heterojunction in 1986, while the power conversion efficiency (PCE) was only 1%. The PCE of single-junction organic solar cell has increased to over 17% in 2019. However, the single-junction solar cells are limited in performance by the severe energy loss. Tandem organic solar cells that use an interconnecting layer connecting two sub-cells provide the possibility of optimizing the devices performance. The two different active layers of sub-cells have non-overlapping light absorption scales, which make the light utilized more adequately. Therefore, the tandem architecture of devices can extend the light absorption within the solar spectrum and effectively reduce energy loss resulting from thermalization loss and transmission loss. According to Shockley and Queisser's calculation, the limitation of the PCE of a tandem solar cell is 42%, which is higher than 33.8% of a single-junction solar cell. In organic photovoltaics field, the developments of the tandem solar cells benefit from the optimization of active layers, interconnecting layers and construction methods. These achievements have resulted in higher PCEs and the devices approaching practical application. At present, the highest PCE of tandem organic solar cell is 17.3% obtained by Chen's group in 2018, but it is still far from the PCE limitation. According to Kirchhoff's law, the open-circuit voltage (VOC) in series tandem cells is theoretically equal to the sum of the VOCs of sub-cells, and the short-circuit current (JSC) in parallel cells is equal to the sum of the JSCs of sub-cells. Hence, the series tandem solar cells still face with the challenge of the unmatched JSCs and the complexed processing methods. Here, this review mainly focuses on the materials used in tandem solar cells, the structure of the interconnecting layers, the processing methods, the measurement methods and the applications. The critical achievements on tandem organic solar cells in recent years and the progress of larger scale, flexible tandem devices are summarized in this review. It also presents the outlooks of the high performance tandem solar cells based on the material and structure requirements.

Key words: tandem organic solar cell, interconnecting layer, active layer, processing method, measurement method