Abstract
Remarkable power conversion efficiencies (PCE) of metal-halide perovskite solar cells (PSCs) are overshadowed by concerns about their ultimate stability, which is arguably the prime obstacle to commercialization of this promising technology. Herein, the problem is addressed by introducing ethane-1,2-diammonium (+NH3(CH2)2NH3 +, EDA2+) cations into the methyl ammonium (CH3NH3 +, MA+) lead iodide perovskite, which enables, inter alia, systematic tuning of the morphology, electronic structure, light absorption, and photoluminescence properties of the perovskite films. Incorporation of <5 mol% EDA2+ induces strain in the perovskite crystal structure with no new phase formed. With 0.8 mol% EDA2+, PCE of the MAPbI3-based PSCs (aperture of 0.16 cm2) improves from 16.7% ± 0.6% to 17.9% ± 0.4% under 1 sun irradiation, and fabrication of larger area devices (aperture 1.04 cm2) with a certified PCE of 15.2% ± 0.5% is demonstrated. Most importantly, EDA2+/MA+-based solar cells retain 75% of the initial performance after 72 h of continuous operation at 50% relative humidity and 50 °C under 1 sun illumination, whereas the MAPbI3 devices degrade by approximately 90% within only 15 h. This substantial improvement in stability is attributed to the steric and coulombic interactions of embedded EDA2+ in the perovskite structure.
| Original language | English |
|---|---|
| Article number | 1700444 |
| Number of pages | 10 |
| Journal | Advanced Energy Materials |
| Volume | 7 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 2017 |
Keywords
- Alkyldiammonium
- Large area
- Mixed-cations
- Perovskite solar cells
- Stability
Cite this
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Diammonium and Monoammonium Mixed-Organic-Cation Perovskites for High Performance Solar Cells with Improved Stability. / Lu, Jianfeng; Jiang, Liangcong; Li, Wei; Li, Feng; Pai, Narendra K.; Scully, Andrew D; Tsai, Cheng Min; Bach, Udo; Simonov, Alexandr N.; Cheng, Yibing; Spiccia, Leone.
In: Advanced Energy Materials, Vol. 7, No. 18, 1700444, 2017.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Diammonium and Monoammonium Mixed-Organic-Cation Perovskites for High Performance Solar Cells with Improved Stability
AU - Lu, Jianfeng
AU - Jiang, Liangcong
AU - Li, Wei
AU - Li, Feng
AU - Pai, Narendra K.
AU - Scully, Andrew D
AU - Tsai, Cheng Min
AU - Bach, Udo
AU - Simonov, Alexandr N.
AU - Cheng, Yibing
AU - Spiccia, Leone
PY - 2017
Y1 - 2017
N2 - Remarkable power conversion efficiencies (PCE) of metal-halide perovskite solar cells (PSCs) are overshadowed by concerns about their ultimate stability, which is arguably the prime obstacle to commercialization of this promising technology. Herein, the problem is addressed by introducing ethane-1,2-diammonium (+NH3(CH2)2NH3 +, EDA2+) cations into the methyl ammonium (CH3NH3 +, MA+) lead iodide perovskite, which enables, inter alia, systematic tuning of the morphology, electronic structure, light absorption, and photoluminescence properties of the perovskite films. Incorporation of <5 mol% EDA2+ induces strain in the perovskite crystal structure with no new phase formed. With 0.8 mol% EDA2+, PCE of the MAPbI3-based PSCs (aperture of 0.16 cm2) improves from 16.7% ± 0.6% to 17.9% ± 0.4% under 1 sun irradiation, and fabrication of larger area devices (aperture 1.04 cm2) with a certified PCE of 15.2% ± 0.5% is demonstrated. Most importantly, EDA2+/MA+-based solar cells retain 75% of the initial performance after 72 h of continuous operation at 50% relative humidity and 50 °C under 1 sun illumination, whereas the MAPbI3 devices degrade by approximately 90% within only 15 h. This substantial improvement in stability is attributed to the steric and coulombic interactions of embedded EDA2+ in the perovskite structure.
AB - Remarkable power conversion efficiencies (PCE) of metal-halide perovskite solar cells (PSCs) are overshadowed by concerns about their ultimate stability, which is arguably the prime obstacle to commercialization of this promising technology. Herein, the problem is addressed by introducing ethane-1,2-diammonium (+NH3(CH2)2NH3 +, EDA2+) cations into the methyl ammonium (CH3NH3 +, MA+) lead iodide perovskite, which enables, inter alia, systematic tuning of the morphology, electronic structure, light absorption, and photoluminescence properties of the perovskite films. Incorporation of <5 mol% EDA2+ induces strain in the perovskite crystal structure with no new phase formed. With 0.8 mol% EDA2+, PCE of the MAPbI3-based PSCs (aperture of 0.16 cm2) improves from 16.7% ± 0.6% to 17.9% ± 0.4% under 1 sun irradiation, and fabrication of larger area devices (aperture 1.04 cm2) with a certified PCE of 15.2% ± 0.5% is demonstrated. Most importantly, EDA2+/MA+-based solar cells retain 75% of the initial performance after 72 h of continuous operation at 50% relative humidity and 50 °C under 1 sun illumination, whereas the MAPbI3 devices degrade by approximately 90% within only 15 h. This substantial improvement in stability is attributed to the steric and coulombic interactions of embedded EDA2+ in the perovskite structure.
KW - Alkyldiammonium
KW - Large area
KW - Mixed-cations
KW - Perovskite solar cells
KW - Stability
UR - http://www.scopus.com/inward/record.url?scp=85019551199&partnerID=8YFLogxK
U2 - 10.1002/aenm.201700444
DO - 10.1002/aenm.201700444
M3 - Article
VL - 7
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
IS - 18
M1 - 1700444
ER -