A New Method for Fitting Current–Voltage Curves of Planar Heterojunction Perovskite Solar Cells

Liao, Peizhe; Zhao, Xiaojuan; Li, Guolong; Shen, Yan; Wang, Mingkui

doi:10.1007/s40820-017-0159-z

Cited by 118 publications

(105 citation statements)

References 41 publications

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“…

- \frac{d V}{d J} = \frac{(m_{1} + m_{2}) k_{B} T}{q} (\frac{1 + R_{sh}^{- 1} \frac{d V}{d J}}{J_{SC} - J - \frac{V}{R_{sh}}}) + R_{s}

\ln (J_{SC} - J - \frac{V}{R_{sh}}) = \frac{q}{(m_{1} + m_{2}) k_{B} T} (V + J R_{s}) + \ln J_{0}

where m 1 and m 2 are the ideal factors, J SC is the short‐circuit current density, R sh is the shunt resistance, R s is the series resistance, J 0 is the reverse saturation current density. [ 38,39 ] TPFP‐MLMP device has a smaller R s but a larger R sh , and its smaller current loss contributes to a larger J SC . The ideal factor of 2.45 around V oc is quite closing to the theory value of diffusion current domination, indicating the less carrier recombination at the interface.…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Phosphorus‐Containing Lewis Acid and Base Passivation Enabling Efficient and Moisture‐Stable Perovskite Solar Cells

Yang

Dou

Kou

et al. 2020

Adv Funct Materials

173

139

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Multiple-cation lead mixed-halide perovskites (MLMPs) have been recognized as ideal candidates in perovskite solar cells in terms of high efficiency and stability due to decreased open-circuit voltage loss and suppressed yellow phase formation. However, they still suffer from an unsatisfactory long-term moisture stability. In this study, phosphorus-containing Lewis acid and base molecules are employed to improve device efficiency and stability based on their multifunction including recombination reduction, phase segregation suppression, and moisture resistance. The strong fluorine-containing Lewis acid treatment can achieve a champion PCE of 22.02%. Unencapsulated and encapsulated devices retain 63% and 80% of the initial efficiency after 14 days of aging under 75% and 85% relative humidity, respectively. The better passivation of Lewis acid implies more halide defects than Pb defects at the MLMP surface. This unbalanced defect type results from phase segregation that is the synergistic effect of Cs and halide ion migrations. Identifying defect type based on different passivation effects is beneficial to not only choose suitable passivators to boost the efficiency and slow down the moisture degradation of MLMP solar cells, but also to understand the mechanism of defect-assisted moisture degradation.

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“…

- \frac{d V}{d J} = \frac{(m_{1} + m_{2}) k_{B} T}{q} (\frac{1 + R_{sh}^{- 1} \frac{d V}{d J}}{J_{SC} - J - \frac{V}{R_{sh}}}) + R_{s}

\ln (J_{SC} - J - \frac{V}{R_{sh}}) = \frac{q}{(m_{1} + m_{2}) k_{B} T} (V + J R_{s}) + \ln J_{0}

Section: Resultsmentioning

confidence: 99%

Multifunctional Phosphorus‐Containing Lewis Acid and Base Passivation Enabling Efficient and Moisture‐Stable Perovskite Solar Cells

Yang

Dou

Kou

et al. 2020

Adv Funct Materials

173

139

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“…To increase the LHE of solar energy systems, antireflective surfaces [10,[13][14][15], light-scattering layers [16][17][18], and plasmonic photonic crystals [19][20][21] have been developed and applied. Biomimetic soft lithography is a promising alternative for increasing the PCE of PSCs; it involves simply coating or attaching a material to the external surface of a transparent substrate.…”

Section: Introductionmentioning

confidence: 99%

Moth-eye Structured Polydimethylsiloxane Films for High-Efficiency Perovskite Solar Cells

et al. 2019

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HIGHLIGHTS • Moth-eye structured polydimethylsiloxane (PDMS) films with different sizes were fabricated to improve the efficiency of perovskite solar cells. • The PDMS with 300-nm moth-eye films significantly reduced light reflection at the front of the glass and therefore enhanced the solar cell efficiency of ~ 21%. • The PDMS with 1000-nm moth-eye films exhibited beautiful coloration. ABSTRACT Large-area polydimethylsiloxane (PDMS) films with variably sized moth-eye structures were fabricated to improve the efficiency of perovskite solar cells. An approach that incorporated photolithography, bilayer PDMS deposition and replication was used in the fabrication process. By simply attaching the moth-eye PDMS films to the transparent substrates of perovskite solar cells, the optical properties of the devices could be tuned by changing the size of the moth-eye structures. The device with 300-nm moth-eye PDMS films greatly enhanced power conversion efficiency of ~ 21% due to the antireflective effect of the moth-eye structure. Furthermore, beautiful coloration was observed on the 1000-nm moth-eye PDMS films through optical interference caused by the diffraction grating effect. Our results imply that moth-eye PDMS films can greatly enhance the efficiency of perovskite solar cells and building-integrated photovoltaics.

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“…[42] It has been reported that lower R s demonstrates that at high bias voltage, the carrierl oss is suppressed. [42] It has been reported that lower R s demonstrates that at high bias voltage, the carrierl oss is suppressed.…”

Section: Resultsmentioning

confidence: 99%

Interfacial Sulfur Functionalization Anchoring SnO₂ and CH₃NH₃PbI₃ for Enhanced Stability and Trap Passivation in Perovskite Solar Cells

et al. 2018

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Trap states at the interface or in bulk perovskite materials critically influence perovskite solar cells performance and long-term stability. Here, a strategy for efficiently passivating charge traps and mitigating interfacial recombination by SnO surface sulfur functionalization is reported, which utilizes xanthate decomposition on the SnO surface at low temperature. The results show that functionalized sulfur atoms can coordinate with under-coordinated Pb ions near the interface. After device fabrication under more than 60 % humidity in ambient air, the efficiency of methylammonium lead iodide (MAPbI ) perovskite solar cells based on sulfur-functionalized SnO increased from 16.56 % to 18.41 % with suppressed hysteresis, which resulted from the accelerated interfacial charge transport kinetics and decreased traps in bulk perovskite by interfacial sulfur functionalization. Additionally, thermally stimulated current studies show the decreased trap density in the shallow trap area after interfacial sulfur functionalization. The interfacial sulfur functionalized solar cells without sealing also exhibited considerable retardation of solar cell degradation with only 10 % degradation after 70 days air storage. This work demonstrates a facile sulfur functionalization strategy by using xanthate decomposition on SnO surfaces to obtain highly efficient perovskite solar cells.

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A New Method for Fitting Current–Voltage Curves of Planar Heterojunction Perovskite Solar Cells

Cited by 118 publications

References 41 publications

Multifunctional Phosphorus‐Containing Lewis Acid and Base Passivation Enabling Efficient and Moisture‐Stable Perovskite Solar Cells

Multifunctional Phosphorus‐Containing Lewis Acid and Base Passivation Enabling Efficient and Moisture‐Stable Perovskite Solar Cells

Moth-eye Structured Polydimethylsiloxane Films for High-Efficiency Perovskite Solar Cells

Interfacial Sulfur Functionalization Anchoring SnO₂ and CH₃NH₃PbI₃ for Enhanced Stability and Trap Passivation in Perovskite Solar Cells

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A New Method for Fitting Current–Voltage Curves of Planar Heterojunction Perovskite Solar Cells

Cited by 118 publications

References 41 publications

Multifunctional Phosphorus‐Containing Lewis Acid and Base Passivation Enabling Efficient and Moisture‐Stable Perovskite Solar Cells

Multifunctional Phosphorus‐Containing Lewis Acid and Base Passivation Enabling Efficient and Moisture‐Stable Perovskite Solar Cells

Moth-eye Structured Polydimethylsiloxane Films for High-Efficiency Perovskite Solar Cells

Interfacial Sulfur Functionalization Anchoring SnO2 and CH3NH3PbI3 for Enhanced Stability and Trap Passivation in Perovskite Solar Cells

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Interfacial Sulfur Functionalization Anchoring SnO₂ and CH₃NH₃PbI₃ for Enhanced Stability and Trap Passivation in Perovskite Solar Cells