[17p-K405-1~8] 12.5 Organic and hybrid solar cells

1:00 PM - 1:15 PM JST(4:00 AM - 4:15 AM UTC)

[17p-K405-1] Surface treatment of titanium oxide for n-i-p tin perovskite solar cells

〇Chihiro Sakamoto¹, Noboru Ohashi¹, Akio Hasegawa¹, Kazuhura Miwa², Yutaka Matsuo², Minh Anh Truong¹, Richard Murdey¹, Tomoya Nakamura¹, Atsushi Wakamiya¹ (1.Institute for Chemical Research, Kyoto Univ., 2.Graduate School of Engineering, Nagoya Univ.)

Keywords:

tin perovskite solar cells,fullerenes,Titanium oxide

In n-i-p type tin perovskite solar cells using titanium(IV) oxide as electron transport materials, a challenge has been a low open-circuit voltage. In this study, fullerene derivatives with carboxylic acid and phosphonic acid anchoring groups were introduced on the surface of titanium(IV). The derivative with carboxylic acid groups improved the open-circuit voltage from 0.21 V to 0.24 V. The derivative with phosphonic acid groups improved to 0.38 V. The mechanism of open circuit voltage enhancement will be discussed in detail in this presentation.