High-Performance Solid-State PbS Quantum Dot-Sensitized Solar Cells Prepared by Introduction of Hybrid Perovskite Interlayer

Jin Hyuck Heo; Min Hyuk Jang; Min Ho Lee; Dong Hee Shin; Do Hun Kim; Sang Hwa Moon; Sang Wook Kim; Bum Jun Park; Sang Hyuk Im

doi:10.1021/acsami.7b12046

High-Performance Solid-State PbS Quantum Dot-Sensitized Solar Cells Prepared by Introduction of Hybrid Perovskite Interlayer

ACS Appl Mater Interfaces. 2017 Nov 29;9(47):41104-41110. doi: 10.1021/acsami.7b12046. Epub 2017 Nov 16.

Authors

Jin Hyuck Heo^{1

2}, Min Hyuk Jang³, Min Ho Lee³, Dong Hee Shin¹, Do Hun Kim¹, Sang Hwa Moon¹, Sang Wook Kim², Bum Jun Park³, Sang Hyuk Im¹

Affiliations

¹ Department of Chemical and Biological Engineering, Korea University , 145 Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea.
² Department of Molecular Science and Technology, Ajou University , Suwon 443-749, Republic of Korea.
³ Functional Crystallization Center (ERC), Department of Chemical Engineering, Kyung Hee University , 1732 Deogyoung-daero, Yongin-si, Gyeonggi-do, Republic of Korea.

PMID: 29134800
DOI: 10.1021/acsami.7b12046

Abstract

High-performance solid-state PbS quantum dot-sensitized solar cells (QD-SSCs) with stable 9.2% power conversion efficiency at 1 Sun condition are demonstrated by introduction of hybrid perovskite interlayer. The PbS QDs formed on mesoscopic TiO₂ (mp-TiO₂) by spin-assisted successive precipitation and anionic exchange reaction method do not exhibit PbSO₄ but have PbSO₃ oxidation species. By introducing perovskite interlayer in between mp-TiO₂/PbS QDs and poly-3-hexylthiophene, the PbSO₃ oxidation species are fully removed in the PbS QDs and thereby the efficiency of PbS QD-SSCs is enhanced over 90% compared to the pristine PbS QD-SSCs.

Keywords: lead sulfide; passivation; perovskite; quantum dots; sensitized solar cells.