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Title: A quantitative and spatially resolved analysis of the performance-bottleneck in high efficiency, planar hybrid perovskite solar cells

Journal Article · · Energy & Environmental Science
DOI:https://doi.org/10.1039/C7EE03654J· OSTI ID:1429608

Hybrid perovskites represent a potential paradigm shift for the creation of low-cost solar cells. Current power conversion efficiencies (PCEs) exceed 22%. However, despite this, record PCEs are still far from their theoretical Shockley–Queisser limit of 31%. To increase these PCE values, there is a pressing need to understand, quantify and microscopically model charge recombination processes in full working devices. Here, we present a complete microscopic account of charge recombination processes in high efficiency (18–19% PCE) hybrid perovskite (mixed cation and methylammonium lead iodide) solar cells. We employ diffraction-limited optical measurements along with relevant kinetic modeling to establish, for the first time, local photoluminescence quantum yields, trap densities, trapping efficiencies, charge extraction efficiencies, quasi-Fermi-level splitting, and effective PCE estimates. Correlations between these spatially resolved parameters, in turn, allow us to conclude that intrinsic electron traps in the perovskite active layers limit the performance of these state-of-the-art hybrid perovskite solar cells.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1429608
Report Number(s):
NREL/JA-5900-70074
Journal Information:
Energy & Environmental Science, Vol. 11, Issue 4; ISSN 1754-5692
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (5)

Probing the Spatial Heterogeneity of Carrier Relaxation Dynamics in CH 3 NH 3 PbI 3 Perovskite Thin Films with Femtosecond Time‐Resolved Nonlinear Optical Microscopy journal August 2019
C60/Na4FeO3/Li3V2(PO4)3/soft carbon quaternary hybrid superstructure for high-performance battery-supercapacitor hybrid devices journal January 2020
Insights into operational stability and processing of halide perovskite active layers journal January 2019
Bismuth ferrite: an abnormal perovskite with electrochemical extraction of ions from A site journal January 2019
In situ monitoring of the charge carrier dynamics of CH 3 NH 3 PbI 3 perovskite crystallization process journal January 2019

Figures / Tables (6)


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