Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Performance Improvement of PCDTBT: PC70BM Polymer Solar Cells with 1,8-diiodooctane Solvent Additive

Wenjuan Yu
* ORCID logo ,
Jiale Yang
,
Bingting Wang
,
Xiang Fu
,
Changhai Zhou
,
Haijun Zhou
,
Guoxiong Xie
,
Kexiu Dong
,
Gan Jin
Version 1 : Received: 2 May 2022 / Approved: 6 May 2022 / Online: 6 May 2022 (11:44:55 CEST)

How to cite: Yu, W.; Yang, J.; Wang, B.; Fu, X.; Zhou, C.; Zhou, H.; Xie, G.; Dong, K.; Jin, G. Performance Improvement of PCDTBT: PC70BM Polymer Solar Cells with 1,8-diiodooctane Solvent Additive. Preprints 2022, 2022050076. https://doi.org/10.20944/preprints202205.0076.v1 Yu, W.; Yang, J.; Wang, B.; Fu, X.; Zhou, C.; Zhou, H.; Xie, G.; Dong, K.; Jin, G. Performance Improvement of PCDTBT: PC70BM Polymer Solar Cells with 1,8-diiodooctane Solvent Additive. Preprints 2022, 2022050076. https://doi.org/10.20944/preprints202205.0076.v1

Abstract

The power conversion efficiency (PCE) of polymer solar cells (PSCs) are strongly depended on the bulk-heterojunction active layer. Here, the 1,8-diiodooctane (DIO) additives have been added into the PCDTBT: PC70BM blend PSCs. Based on the higher boiling point than host solvent ODB and better solubility of PC71BM, the device photovoltaic properties with DIO additive were changed obviously. The investigations of EQE indicate that the DIO can influence the charge recombination and transportation process, and absorption studies demonstrate that the charge carriers generation process can also be affected by DIO. The overall impact reflected on the decreased equivalent resistant. With 3% v/v DIO, the Jsc, Voc and FF are both increased. Correspondingly, a highest PCE is achieved of 6.15%, while the reference device without DIO only has a PCE of 5.23%. Hence, adding DIO solvent additive is a effective method for the photovoltaic properties improving of PCDTBT: PC70BM blend PSCs.

Keywords

polymer solar cells; solvent additive; DIO; PCDTBT

Subject

Physical Sciences, Optics and Photonics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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