Exploring Local Ionic Motion in Perovskite Solar Cells at Nanoscale through Scanning Thermo-Ionic Microscopy

G. Paul; J. Schall; M. Migliozzi; A. Palmstrom; S. Johnston; M. Al-Jassim; C.-S. Jiang; D. Kern

doi:10.1109/PVSC57443.2024.10749300

Exploring Local Ionic Motion in Perovskite Solar Cells at Nanoscale through Scanning Thermo-Ionic Microscopy

G. Paul, J. Schall, M. Migliozzi, A. Palmstrom, S. Johnston, M. Al-Jassim, C.-S. Jiang, D. Kern

Colorado School of Mines

Research output: Contribution to conference › Paper

Abstract

We investigate the local ionic motion in the absorber layer of perovskite solar cells using scanning thermo-ionic microscopy (STIM). STIM images of perovskite films show higher STIM amplitude at most of the grain boundaries due to higher ionic motion at those regions. The perovskite absorber layer of devices aged under blue (450 nm) light soaking shows higher amplitude in STIM signal compared to controls kept in dark storage. Such enhancement of STIM amplitude upon aging under light implies an increased concentration or diffusivity (or both) of mobile ionic species in stressed devices. Our results demonstrate the utilization of the STIM technique to assess and understand the intrinsic local ionic motion in perovskite absorbers for further advancement in device stability and functionality.

Original language	American English
Pages	1629-1631
Number of pages	3
DOIs	https://doi.org/10.1109/PVSC57443.2024.10749300
State	Published - 2024
Event	IEEE PVSC 52 - Seattle Duration: 9 Jun 2024 → 14 Jun 2024

Conference

Conference	IEEE PVSC 52
City	Seattle
Period	9/06/24 → 14/06/24

NREL Publication Number

NREL/CP-5K00-90507

Keywords

aging
films
frequency measurement
grain boundaries
microscopy
nanoscale devices
perovskites
photovoltaic cells
photovoltaic systems
reliability

Access to Document

10.1109/PVSC57443.2024.10749300

Cite this

@conference{adb4ec1fc70d4d85aa22b93f55d703de,

title = "Exploring Local Ionic Motion in Perovskite Solar Cells at Nanoscale through Scanning Thermo-Ionic Microscopy",

abstract = "We investigate the local ionic motion in the absorber layer of perovskite solar cells using scanning thermo-ionic microscopy (STIM). STIM images of perovskite films show higher STIM amplitude at most of the grain boundaries due to higher ionic motion at those regions. The perovskite absorber layer of devices aged under blue (450 nm) light soaking shows higher amplitude in STIM signal compared to controls kept in dark storage. Such enhancement of STIM amplitude upon aging under light implies an increased concentration or diffusivity (or both) of mobile ionic species in stressed devices. Our results demonstrate the utilization of the STIM technique to assess and understand the intrinsic local ionic motion in perovskite absorbers for further advancement in device stability and functionality.",

keywords = "aging, films, frequency measurement, grain boundaries, microscopy, nanoscale devices, perovskites, photovoltaic cells, photovoltaic systems, reliability",

author = "G. Paul and J. Schall and M. Migliozzi and A. Palmstrom and S. Johnston and M. Al-Jassim and C.-S. Jiang and D. Kern",

year = "2024",

doi = "10.1109/PVSC57443.2024.10749300",

language = "American English",

pages = "1629--1631",

note = "IEEE PVSC 52 ; Conference date: 09-06-2024 Through 14-06-2024",

}

TY - CONF

T1 - Exploring Local Ionic Motion in Perovskite Solar Cells at Nanoscale through Scanning Thermo-Ionic Microscopy

AU - Paul, G.

AU - Schall, J.

AU - Migliozzi, M.

AU - Palmstrom, A.

AU - Johnston, S.

AU - Al-Jassim, M.

AU - Jiang, C.-S.

AU - Kern, D.

PY - 2024

Y1 - 2024

N2 - We investigate the local ionic motion in the absorber layer of perovskite solar cells using scanning thermo-ionic microscopy (STIM). STIM images of perovskite films show higher STIM amplitude at most of the grain boundaries due to higher ionic motion at those regions. The perovskite absorber layer of devices aged under blue (450 nm) light soaking shows higher amplitude in STIM signal compared to controls kept in dark storage. Such enhancement of STIM amplitude upon aging under light implies an increased concentration or diffusivity (or both) of mobile ionic species in stressed devices. Our results demonstrate the utilization of the STIM technique to assess and understand the intrinsic local ionic motion in perovskite absorbers for further advancement in device stability and functionality.

AB - We investigate the local ionic motion in the absorber layer of perovskite solar cells using scanning thermo-ionic microscopy (STIM). STIM images of perovskite films show higher STIM amplitude at most of the grain boundaries due to higher ionic motion at those regions. The perovskite absorber layer of devices aged under blue (450 nm) light soaking shows higher amplitude in STIM signal compared to controls kept in dark storage. Such enhancement of STIM amplitude upon aging under light implies an increased concentration or diffusivity (or both) of mobile ionic species in stressed devices. Our results demonstrate the utilization of the STIM technique to assess and understand the intrinsic local ionic motion in perovskite absorbers for further advancement in device stability and functionality.

KW - aging

KW - films

KW - frequency measurement

KW - grain boundaries

KW - microscopy

KW - nanoscale devices

KW - perovskites

KW - photovoltaic cells

KW - photovoltaic systems

KW - reliability

U2 - 10.1109/PVSC57443.2024.10749300

DO - 10.1109/PVSC57443.2024.10749300

M3 - Paper

SP - 1629

EP - 1631

T2 - IEEE PVSC 52

Y2 - 9 June 2024 through 14 June 2024

ER -

Exploring Local Ionic Motion in Perovskite Solar Cells at Nanoscale through Scanning Thermo-Ionic Microscopy

Abstract

Conference

NREL Publication Number

Keywords

Access to Document

Fingerprint

Cite this