A Spirobixanthene‐Based Dendrimeric Hole‐Transporting Material for Perovskite Solar Cells. Issue 1 (9th October 2019)

• Record Type: Journal Article
• Authors: Yu, Wei; Zhang, Jinhui; Tu, Dandan; Yang, Qing; Wang, Xuchao; Liu, Xuan; Cheng, Feng; Qiao, Yu; Li, Gang; Guo, Xin; Li, Can
• Is Part Of: Solar RRL. Volume 4:Issue 1(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-10-09
• Subjects: dendrimers -- hole-transporting materials -- perovskite solar cells -- spirobixanthene; Solar energy -- Periodicals; Photovoltaic power generation -- Periodicals; Solar energy -- Research -- Periodicals; Photovoltaic power generation -- Research -- Periodicals; Periodicals; 333.7923
• DOI: 10.1002/solr.201900367
• Languages: English
• ISSNs: 2367-198X

Abstract

Abstract : A dendrimer based on a spirobixanthene core, termed DH1, is designed and synthesized as a hole‐transporting material (HTM) for perovskite solar cells (PSCs). DH1 showing a hyperbranched structure with methoxydiphenylamine carbazole dendrons stretching outward along the para ‐phenylene spacer acquires a large molecular size of up to 1.9 nm, which favors good thermal stability and amorphous property. The thus obtained DH1‐based pinhole‐free film as a hole‐transport layer results in a power conversion efficiency of 17.13% and reduced hysteresis behavior of MAPbI3 ‐based planar PSCs. This work provides the first example of the use of dendrimer‐type HTM for PSC application, demonstrating a promising approach to design HTMs in a quasiglobular dendrimer with a large molecular size. Abstract : A spirobixanthene‐based dendrimer, DH1, is designed and synthesized. DH1 with the hyperbranched structure shows a large molecular size of up to 1.9 nm. The amorphous DH1 is the first dendrimer‐type HTM applied for MAPbI3 perovskite solar cells, obtaining a power conversion efficiency of 17.13%. This work demonstrates that a quasiglobular dendrimer with a large molecular size is a promising design approach for excellent HTMs.