Defect Passivation of CsPbI2Br Layer Through ... - ncp.edu.pk
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Kalsoom Fatima 1,2 , Muhammad Irfan Haider 2 , Samina Qamar 1,2 , Zareen Akhter 2 , Muhammad Sultan 1, *, Lukas Schmidt- Mende 3 1. Nanoscience and Technology Department, National Centre for Physics, Islamabad, Pakistan 2. Department of Chemistry, Quaid-i-Azam University Islamabad, Pakistan 3. Department of Physics, University of Konstanz, Germany Defect Passivation of CsPbI 2 Br Layer Through Ethylene Diamine for Improved Performance of Perovskite Solar Cells Introduction Inorganic perovskites composed of cesium (Cs + ) are considered potential stable alternate with dramatically improved thermal stability [2]. ▪ and study the role of interfacial modifications on the performance of the device. Inorganic perovskites composed of cesium (Cs + ) are considered potential stable alternate with dramatically improved thermal stability [2]. ▪ based perovskite thin films are stable up to 400 °C, while methyl ammonium (MA) and/or (FA) containing perovskite thin films rapidly deteriorated over 200 °C [3]. Here we develop inorganic solar and study the role of interfacial modifications on the performance of the device. Perovskite Film Characterization Acknowledgement Project # 57345608 & 57458981 1] Anaya, Miguel, et al. "ABX3 perovskites for tandem solar cells." Joule 1.4 (2017): 769-793. [2] Fatima, Kalsoom, et al. "Performance enhancement of CsPbI2Br perovskite solar cells via stoichiometric control and interface engineering." Solar Energy 211 (2020): 654- 660. [3] Zhang, Jing, et al. "Critical review of recent progress of flexible perovskite solar cells." Materials Today [39 (2020): 66-88. References Conclusions Inorganic perovskites composed of cesium (Cs alternate with dramatically improved thermal stability [2]. ▪ develop inorganic solar and study the role of interfacial modifications on the performance of the device. Inorganic perovskites composed of cesium (Cs + ) are considered potential stable alternate with dramatically improved thermal stability [2]. ▪ develop inorganic solar and study the role of interfacial modifications on the performance of the device. Device Performance In summary, a simple methodology of surface treatment of already prepared CsPbI 2 Br perovskite film with EDA was developed to passivate perovskite defects. EDA molecule can passivate defect sites in CsPbI 2 Br through coordinate bonding between the nitrogen atoms and the undercoordinated lead ions, leading to a reduction in the electronic trap density ultimately leading to enhanced device performance. TPC measurements Current density-voltage curves PL and TRPL measurements XRD Analysis Device Jsc (mA/cm 2 ) FF Voc (V) PCE(%) Pristine (F) 12.7 53 1.03 7.0 EDA Treated (F) 12.2 66 1.1 9.4 Comparison of finite and renewable planetary energy reserves.[1] Perovskite absorber material has ABX 3 geometry A = MA, FA Defect passivation Interfacial treatment → performance A = Cs Enhanced thermal stability Solar cells (Best approach to use Sunlight) Perovskite solar cells (PSCs) are the most emerging area of research. Smart applications of Flexible PSCs[3] Properties of PSCs • Low cost • Structural flexibility • High efficiency 3.2%(2009) → 25.2%(2020) [2] Low thermal and moisture stability Motivation behind current research work IPSCs, low efficiency due to defects Inorganic perovskites composed of cesium (Cs + ) are considered potential stable alternate with dramatically improved thermal stability [2]. ▪ (FA) containing perovskite thin films rapidly deteriorated over 200 °C [3]. Here we develop inorganic solar and study the role of interfacial modifications on the performance of the device. Schematics Defect passivation through coordinate bonding between the nitrogen atoms and the undercoordinated lead ions. ➢ No shift in XRD peaks position depicting no structural change upon treatment. ➢ EDA treated perovskite showed higher PL intensity and shorter τ 1 values suggesting defect passivation by treatment. ➢ In EDA treated device improvement in V OC corresponds to decrease in non-radiative recombination. ➢ The rapid photocurrent decay in TPC measurement confirm better charge extraction in EDA treated device. detailed photovoltaic parameters of fabricated PSCs Device Fabrication Emergence of inorganic PSCs to address stability challenge!
Transcript of Defect Passivation of CsPbI2Br Layer Through ... - ncp.edu.pk
Kalsoom Fatima1,2, Muhammad Irfan Haider2, Samina Qamar 1,2, Zareen Akhter2, Muhammad Sultan1,*, Lukas Schmidt- Mende3
1. Nanoscience and Technology Department, National Centre for Physics, Islamabad, Pakistan 2. Department of Chemistry, Quaid-i-Azam University Islamabad, Pakistan
3. Department of Physics, University of Konstanz, Germany
Device Performance
Device PCE(%) FF Voc(V) Jsc(mA/cm2)Without plasma
treatment4.3 45.8 0.88 10.6
With plasma treatment
8.0 59 1.1 12.2
Defect Passivation of CsPbI2Br Layer Through Ethylene Diamine for Improved Performance of Perovskite Solar Cells
Introduction
Inorganic perovskites composed of cesium (Cs+) are considered potential stablealternate with dramatically improved thermal stability [2].▪ and study the role of interfacial modifications on the performance of the device.
Inorganic perovskites composed of cesium (Cs+) are considered potentialstable alternate with dramatically improved thermal stability [2].▪ based perovskite thin films are stable up to 400 °C, while methyl ammonium (MA)
and/or (FA) containing perovskite thin films rapidly deteriorated over 200 °C [3]. Here wedevelop inorganic solar and study the role of interfacial modifications on theperformance of the device.
Perovskite Film Characterization
Acknowledgement
Project # 57345608& 57458981
1] Anaya, Miguel, et al. "ABX3 perovskitesfor tandem solar cells." Joule 1.4 (2017):769-793.[2] Fatima, Kalsoom, et al. "Performanceenhancement of CsPbI2Br perovskite solarcells via stoichiometric control and interfaceengineering." Solar Energy 211 (2020): 654-660.[3] Zhang, Jing, et al. "Critical review ofrecent progress of flexible perovskite solarcells." Materials Today [39 (2020): 66-88.
References
Conclusions
Inorganic perovskites composed of cesium (Cs+) are considered potential stablealternate with dramatically improved thermal stability [2].▪ develop inorganic solar and study the role of interfacial modifications on the performance of the
device.
Inorganic perovskites composed of cesium (Cs+) are considered potential stable alternatewith dramatically improved thermal stability [2].▪ develop inorganic solar and study the role of interfacial modifications on the performance of the
device.
Device Performance
In summary, a simple methodology of surface treatment of already prepared CsPbI2Brperovskite film with EDA was developed to passivate perovskite defects. EDA molecule can passivate defect sites in CsPbI2Brthrough coordinate bonding between the nitrogen atoms and the undercoordinated lead ions, leading to a reduction in theelectronic trap density ultimately leading to enhanced device performance.
TPC measurements Current density-voltage curves
PL and TRPL measurements
XRD Analysis
Device Jsc (mA/cm2) FF Voc (V) PCE(%)Pristine (F) 12.7 53 1.03 7.0
EDA Treated (F) 12.2 66 1.1 9.4
Comparison of finite and renewable planetary energy reserves.[1]
Perovskite absorber material has ABX3
geometryA = MA, FA
Defect passivation
Interfacial treatment →performance
A = CsEnhanced thermal stability
Solar cells(Best approach to use Sunlight)
Perovskite solar cells (PSCs)are the most emerging area
of research.
Smart applications of Flexible PSCs[3]
Properties of PSCs• Low cost• Structural flexibility• High efficiency
3.2%(2009) →25.2%(2020) [2]
Low thermal and moisture stability
Motivation behind
current research work
IPSCs, low efficiency due
to defects
Inorganic perovskites composed of cesium (Cs+) areconsidered potential stable alternate with dramaticallyimproved thermal stability [2].▪ (FA) containing perovskite thin films rapidly
deteriorated over 200 °C [3]. Here we developinorganic solar and study the role of interfacialmodifications on the performance of the device.
Schematics
Defect passivation through coordinate bonding between the nitrogen atoms and the undercoordinated lead ions.
➢ No shift in XRD peaks positiondepicting no structural changeupon treatment.
➢ EDA treated perovskite showedhigher PL intensity and shorterτ1 values suggesting defectpassivation by treatment.
➢ In EDA treated deviceimprovement in VOC
corresponds to decrease innon-radiative recombination.
➢ The rapid photocurrent decayin TPC measurement confirmbetter charge extraction inEDA treated device.
detailed photovoltaic parameters of fabricated PSCs
Device Fabrication
Emergence of inorganic PSCs to address stability challenge!
