Effect of temperature on light induced degradation in methylammonium lead iodide perovskite thin films and solar cells

Abdelmageed, Ghada; MacKeen, Cameron; Hellier, Kaitlin; Jewell, Leila; Seymour, Lydia; Tingwald, Mark; Bridges, F.; Zhang, Jin Z.; Carter, Sue

doi:10.1016/j.solmat.2017.09.053

Cited by 109 publications

(96 citation statements)

References 26 publications

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“…In this case, the relative PLs of PQD MPA , PQD HPA , PQD TDPA , and PQD ODPA remained above 80 % after 1 h, whereas that of the APTES‐only PQD decreased below 50 % (Figure b). Degradation in air is attributed to the reaction with oxygen and light . Both tests demonstrate that PA and APTES ligands, if used together, enable the formation of PQDs with higher PL stability, possibly because of better surface passivation and a decrease in surface defects.…”

Section: Resultsmentioning

confidence: 95%

Synergistic Surface Passivation of CH₃NH₃PbBr₃ Perovskite Quantum Dots with Phosphonic Acid and (3‐Aminopropyl)triethoxysilane

Vickers

Rao

et al. 2019

Chemistry A European J

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CH 3 NH 3 PbBr 3 perovskite quantum dots (PQDs) are synthesized by using four different linear alkyl phosphonic acids (PAs) in conjunction with (3-aminopropyl)triethoxysilane (APTES) as capping ligands. The resultant PQDs are characterizedb ym eanso fX RD, TEM, Ramans pectroscopy, FTIR spectroscopy,U V/Vis, photoluminescence( PL), time-resolved PL, and X-ray photoelectrons pectroscopy (XPS). PA chain length is shownt oc ontrol the PQD size (ca. 2.9-4.2 nm) and excitonic absorption band positions (l = 488-525 nm), with shorter chain lengths corresponding to smaller sizes and bluer absorptions. All samples show ah igh PL quantumy ield (ca. 46-83 %) and high PL stability;t his is in-dicative of al ow density of band gap trap states and effective surface passivation.S tabilityi sh igher for smaller PQDs; this is attributed to better passivation due to better solubility and less steric hindrance of the shorter PA ligands. Based on the FTIR, Raman, and XPS results, it is proposed that Pb 2 + and CH 3 NH 3 + surface defectsa re passivated by RÀPO 3 2À or RÀPO 2 (OH) À ,w hereasB r À surface defects are passivated by RÀNH 3 + moieties. This study establishes the combination of PA and APTESl igandsa sah ighly effective dual passivation systemf or the synergistic passivation of multiple surface defects of PQDst hrough primarily ionic bonding.

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Section: Resultsmentioning

confidence: 95%

Synergistic Surface Passivation of CH₃NH₃PbBr₃ Perovskite Quantum Dots with Phosphonic Acid and (3‐Aminopropyl)triethoxysilane

Vickers

Rao

et al. 2019

Chemistry A European J

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“…This is in contrast to the very small temperature variation with illumination intensity in the “solar furnace” concentrator used in studies shown in Figure (see Figure a andExperimental Section). Elevated temperatures were previously found to accelerate PSC dark‐ and photo‐degradation …”

Section: Resultsmentioning

confidence: 99%

Bias‐Dependent Stability of Perovskite Solar Cells Studied Using Natural and Concentrated Sunlight

et al. 2019

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Degradation rates in perovskite solar cells (PSCs) were previously shown to be bias dependent; however, little is known about the mechanisms and driving factors that account for such degradation. Herein, stability studies under concentrated sunlight are demonstrated as a powerful experimental methodology to investigate bias-dependent PSC degradation mechanisms. Stress testing of encapsulated PSCs' stability shows that light intensity is more significant than the illumination dose for PSC degradation under short-circuit (SC) conditions, whereas the dose is the determining factor under open-circuit (OC) stressing. This indicates that different degradation mechanisms are dominant under different bias conditions. It is postulated that degradation at SC biasing is dominated by ion migration, facilitated by photogenerated defects. Degradation at OC biasing can be explained by photogenerated radicals acting as nonradiative recombination centers (charge traps), which are created via reactions with accumulated charge carriers. Trap formation upon OC biasing is in accordance with degradation of photoluminescence and OC voltage (V OC ) observed under this stress. A combination of multiple mechanisms, all with reduced driving forces compared with OC /SC biasing, explains degradation at maximum power point biasing. Understanding the bias effect on PSC stability can elucidate the underlying degradation mechanisms and lead to routes to reduce them.

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“…Here, an MAPbBr3@PS film sample prepared by the electrospinning technique (PS-1) was used as the contrast with a film prepared by spin coating (PS-2). [25][26][27][28][29] In order to investigate the stability of the sample in water, PS-1 and PS-2 were separately soaked in distilled water and their fluorescence intensity was regularly monitored. The corresponding fluorescence intensity statistics are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In this work, the stabilities of MAPbBr3 are significantly improved by the electrospinning process with PS. Here, an MAPbBr3@PS film sample prepared by the electrospinning technique (PS‐1) was used as the contrast with a film prepared by spin coating (PS‐2) 25–29 …”

Section: Resultsmentioning

confidence: 99%

Construction of ultra‐stable perovskite–polymer fibre membranes by electrospinning technology and its application to light‐emitting diodes

Liu

Wang

et al. 2020

Polymer International

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Recently, organometallic halide perovskites have shown attractive application prospects in photoelectric devices depending on their excellent electro-optic properties. However, their poor stability has greatly limited their practical applications. Here, methylammonium lead tribromide (MAPbBr 3) crystals are protected by polystyrene (PS) fibre membranes using electrospinning technology. The MAPbBr 3 @PS composite fibre membranes fabricated in this work not only show strong photoluminescence properties but also excellent stability: 70% of the fluorescence intensity of MAPbBr 3 @PS is maintained after soaking in water for 30 days, 85% after leaving at 95°C for 350 min, and 90% after irradiating under UV light for 100 h. The excellent stability of the MAPbBr 3 @PS fibre membranes may be attributed to the hydrogen bonds between the MAPbBr 3 crystal and the PS fibre. In addition, a high-brightness white-light-emitting diode based on MAPbBr 3 @PS fibre was fabricated, which fully demonstrates its application prospects in the field of colour conversion.

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Effect of temperature on light induced degradation in methylammonium lead iodide perovskite thin films and solar cells

Cited by 109 publications

References 26 publications

Synergistic Surface Passivation of CH₃NH₃PbBr₃ Perovskite Quantum Dots with Phosphonic Acid and (3‐Aminopropyl)triethoxysilane

Synergistic Surface Passivation of CH₃NH₃PbBr₃ Perovskite Quantum Dots with Phosphonic Acid and (3‐Aminopropyl)triethoxysilane

Bias‐Dependent Stability of Perovskite Solar Cells Studied Using Natural and Concentrated Sunlight

Construction of ultra‐stable perovskite–polymer fibre membranes by electrospinning technology and its application to light‐emitting diodes

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Effect of temperature on light induced degradation in methylammonium lead iodide perovskite thin films and solar cells

Cited by 109 publications

References 26 publications

Synergistic Surface Passivation of CH3NH3PbBr3 Perovskite Quantum Dots with Phosphonic Acid and (3‐Aminopropyl)triethoxysilane

Synergistic Surface Passivation of CH3NH3PbBr3 Perovskite Quantum Dots with Phosphonic Acid and (3‐Aminopropyl)triethoxysilane

Bias‐Dependent Stability of Perovskite Solar Cells Studied Using Natural and Concentrated Sunlight

Construction of ultra‐stable perovskite–polymer fibre membranes by electrospinning technology and its application to light‐emitting diodes

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Synergistic Surface Passivation of CH₃NH₃PbBr₃ Perovskite Quantum Dots with Phosphonic Acid and (3‐Aminopropyl)triethoxysilane

Synergistic Surface Passivation of CH₃NH₃PbBr₃ Perovskite Quantum Dots with Phosphonic Acid and (3‐Aminopropyl)triethoxysilane