Abstract
The remarkable power conversion efficiency of perovskite solar cells (PSCs) is overshadowed by concerns about their stability, and its degradation mechanism remains elusive. PSCs are reported to suffer long-term degradation under real working conditions. In this work, we systematically studied the degradation mechanism of PSCs with various device configurations (planar, meso and inverted device structure) by continuous 12-h day/night cycling tests. The fatigue phenomenon, defined in our previous work, was observed both in planar and meso devices. A relationship between the fatigue instability and device-physics of PSCs is established. Through a comparative analysis of results from day/night cycling tests, bulk/interfacial morphology analysis, and transient photocurrent/photovoltage decay measurements, we identify the fatigue behavior in the day/night cycling tests by a cyclic ion movement mechanism, where ions migrate towards the electrode interfaces under illumination and move back to the bulk in the dark. This cyclic migration of ions generates defects in bulk perovskite without destroying the crystal structure. The present study offers a new approach to evaluate the stability of PSCs, contributing to better understanding of degradation mechanisms that are critically important for applications of this novel photovoltaic technology.
| Original language | English |
|---|---|
| Pages (from-to) | 687-694 |
| Number of pages | 8 |
| Journal | Nano Energy |
| Volume | 58 |
| DOIs | |
| Publication status | Published - 1 Apr 2019 |
Keywords
- Charge accumulation
- Fatigue
- Ion movement
- Perovskite solar cells
- Stability
Cite this
}
Fatigue stability of CH3NH3PbI3 based perovskite solar cells in day/night cycling. / Jiang, Liangcong; Lu, Jianfeng; Raga, Sonia R.; Sun, Jingsong; Lin, Xiongfeng; Huang, Wenchao; Huang, Fuzhi; Bach, Udo; Cheng, Yi Bing.
In: Nano Energy, Vol. 58, 01.04.2019, p. 687-694.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Fatigue stability of CH3NH3PbI3 based perovskite solar cells in day/night cycling
AU - Jiang, Liangcong
AU - Lu, Jianfeng
AU - Raga, Sonia R.
AU - Sun, Jingsong
AU - Lin, Xiongfeng
AU - Huang, Wenchao
AU - Huang, Fuzhi
AU - Bach, Udo
AU - Cheng, Yi Bing
PY - 2019/4/1
Y1 - 2019/4/1
N2 - The remarkable power conversion efficiency of perovskite solar cells (PSCs) is overshadowed by concerns about their stability, and its degradation mechanism remains elusive. PSCs are reported to suffer long-term degradation under real working conditions. In this work, we systematically studied the degradation mechanism of PSCs with various device configurations (planar, meso and inverted device structure) by continuous 12-h day/night cycling tests. The fatigue phenomenon, defined in our previous work, was observed both in planar and meso devices. A relationship between the fatigue instability and device-physics of PSCs is established. Through a comparative analysis of results from day/night cycling tests, bulk/interfacial morphology analysis, and transient photocurrent/photovoltage decay measurements, we identify the fatigue behavior in the day/night cycling tests by a cyclic ion movement mechanism, where ions migrate towards the electrode interfaces under illumination and move back to the bulk in the dark. This cyclic migration of ions generates defects in bulk perovskite without destroying the crystal structure. The present study offers a new approach to evaluate the stability of PSCs, contributing to better understanding of degradation mechanisms that are critically important for applications of this novel photovoltaic technology.
AB - The remarkable power conversion efficiency of perovskite solar cells (PSCs) is overshadowed by concerns about their stability, and its degradation mechanism remains elusive. PSCs are reported to suffer long-term degradation under real working conditions. In this work, we systematically studied the degradation mechanism of PSCs with various device configurations (planar, meso and inverted device structure) by continuous 12-h day/night cycling tests. The fatigue phenomenon, defined in our previous work, was observed both in planar and meso devices. A relationship between the fatigue instability and device-physics of PSCs is established. Through a comparative analysis of results from day/night cycling tests, bulk/interfacial morphology analysis, and transient photocurrent/photovoltage decay measurements, we identify the fatigue behavior in the day/night cycling tests by a cyclic ion movement mechanism, where ions migrate towards the electrode interfaces under illumination and move back to the bulk in the dark. This cyclic migration of ions generates defects in bulk perovskite without destroying the crystal structure. The present study offers a new approach to evaluate the stability of PSCs, contributing to better understanding of degradation mechanisms that are critically important for applications of this novel photovoltaic technology.
KW - Charge accumulation
KW - Fatigue
KW - Ion movement
KW - Perovskite solar cells
KW - Stability
UR - http://www.scopus.com/inward/record.url?scp=85061336336&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2019.02.005
DO - 10.1016/j.nanoen.2019.02.005
M3 - Article
VL - 58
SP - 687
EP - 694
JO - Nano Energy
JF - Nano Energy
SN - 2211-2855
ER -