Connecting Interfacial Mechanical Adhesion, Efficiency, and Operational-Stability in High-Performance Inverted Perovskite Solar Cells

Zhenghong Dai, Shuai You, Dwaipayan Chakraborty, Shunran Li, Yadong Zhang, Anush Ranka, Stephen Barlow, Joseph Berry, Seth Marder, Peijun Guo, Yue Qi, Kai Zhu, Nitin Padture

Research output: Contribution to journalArticlepeer-review

Abstract

Carbazole-based self-assembled monolayers (SAMs) at the interface between the metal-halide perovskite (MHP) and the transparent conducting oxide (TCO) serve the function of hole-transport layers in p-i-n "inverted" perovskite solar cells (PSCs). Here we show that the use of an iodine-terminated carbazole-based SAM increases the interfacial mechanical adhesion dramatically (2.6-fold) and that this is responsible for substantial improvements in the interfacial morphology, photocarrier transport, and operational stability. While the improved morphology and optoelectronic properties impart high efficiency (up to 25.39%) to the PSCs, the enhanced adhesion suppresses nucleation and propagation of pores/cracks during PSC operation, resulting in the retention of 96% of the initial efficiency after 1000 h of continuous-illumination testing at the maximum power-point. This demonstrates the strong connection between judicious interfacial adhesion toughening and simultaneous enhancement in the efficiency and operational stability of p-i-n PSCs, with broader implications for the reliability and durability of perovskite photovoltaics before they can be commercialized.
Original languageAmerican English
Pages (from-to)1880-1887
Number of pages8
JournalACS Energy Letters
Volume9
Issue number4
DOIs
StatePublished - 2024

NREL Publication Number

  • NREL/JA-5900-89155

Keywords

  • interfaces
  • molecules
  • power conversion efficiency
  • surface interactions
  • thin films

Fingerprint

Dive into the research topics of 'Connecting Interfacial Mechanical Adhesion, Efficiency, and Operational-Stability in High-Performance Inverted Perovskite Solar Cells'. Together they form a unique fingerprint.

Cite this