Two-Dimensional Graphitic Carbon Nitride for Improving the Performance of Organic Solar Cells

Zihao Xia; Yali Sun; Yabin Jiang; Langkun Chen; Chaoyue Zhao; Chaohua Dai; Zhenbang Wei; Guangye Zhang; Yaoguang Yu; Hong Wang; ZhiZhen Zhang; Jiangsheng Xie; Shu Zhou; Qian Zhang; Xiangguo Li; Jing Shuai; Chunzhen Yang; Shenghua Liu

doi:10.1021/acs.jpclett.3c01536

Two-Dimensional Graphitic Carbon Nitride for Improving the Performance of Organic Solar Cells

J Phys Chem Lett. 2023 Jul 27;14(29):6532-6541. doi: 10.1021/acs.jpclett.3c01536. Epub 2023 Jul 14.

Authors

Zihao Xia¹, Yali Sun¹, Yabin Jiang¹, Langkun Chen¹, Chaoyue Zhao², Chaohua Dai¹, Zhenbang Wei¹, Guangye Zhang², Yaoguang Yu¹, Hong Wang¹, ZhiZhen Zhang¹, Jiangsheng Xie¹, Shu Zhou¹, Qian Zhang¹, Xiangguo Li¹, Jing Shuai¹, Chunzhen Yang¹, Shenghua Liu¹

Affiliations

¹ School of Materials, Shenzhen Campus of Sun Yat-sen University, No. 66, Gongchang Road, Guangming District, Shenzhen, Guangdong 518107, China.
² College of New Materials and New Energies, Shenzhen Technology University, 3002 Lantian Road, Pingshan District, Shenzhen, Guangdong 518118, China.

PMID: 37450690
DOI: 10.1021/acs.jpclett.3c01536

Abstract

Organic solar cells (OSCs) have attracted lots of attention owing to their low cost, lightweight, and flexibility properties. Nowadays, the performance of OSCs is continuously improving with the development of active layer materials. However, the traditional hole transport layer (HTL) material Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) presents insufficient conductivity and rapid degradation, which decreases the efficiency and stability of OSCs. To conquer the challenge, the two-dimensional (2D) graphitic carbon nitride (g-C₃N₄) nanomaterials incorporated into the PEDOT:PSS as hybrid HTL are reported. The addition of g-C₃N₄ into PEDOT:PSS enables the thickness of the HTL to decrease for enhancing the transmittance of the film and increase the conductivity of PEDOT:PSS. Thus, the device exhibts improved charge transport and suppressed carrier recombination, leading to the increase in short-circuit current density and power conversion efficiency of the devices. This work demonstrates that the incorporation of 2D g-C₃N₄ into PEDOT:PSS for D18:Y6 and PM6:L8-BO-based OSCs can significantly improve the device efficiency to 17.48% and 18.47% with the enhancement of 7.04% and 8.46%, respectively.