Linked Nickel Oxide/Perovskite Interface Passivation for High‐Performance Textured Monolithic Tandem Solar Cells (Adv. Energy Mater. 40/2021)

Zhumagali, Shynggys; Isikgor, Furkan H.; Yin, Jun; Ugur, Esma; Bastiani, Michele De; Subbiah, Anand S.; Mirabelli, Alessandro J.; Azmi, Randi; Harrison, George T.; Troughton, Joel; Aydın, Erkan; Liu, Jiang; Allen, Thomas G.; Rehman, Atteq Ur; Baran, Derya; Mohammed, Omar F.; Wolf, Stefaan De

doi:10.1002/aenm.202170160

Cited by 14 publications

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“…[ 34,38 ] Although NiO x ‐based PSCs often exhibit good long‐term stability, [ 47,54,55 ] relatively high hysteresis and voltage losses due to chemical interactions between NiO x and the perovskite film are commonly observed drawbacks when employing this HTL. [ 60–64 ] In this regard, self‐assembled molecules (SAMs) have presented themselves as a very good alternative HTL for both single‐junction p–i–n PSCs as well as monolithic tandem solar cells. [ 12,27,65 ] The excellent energy level alignment and suppressed non‐radiative recombination losses result in a significantly higher V OC and fill factor (FF) compared to other HTLs.…”

Section: Resultsmentioning

confidence: 99%

“…[ 53,62,64,106–108 ] As discussed above and in other reports, the negative impacts of these interactions on the optoelectronic properties of PSCs can be strongly reduced by employing a double‐layer HTL. [ 63 ] However, in case of textured substrates with a much larger surface area, the effect of the exact precursor stoichiometry on i) the strength of these interactions and ii) on crystallization behavior in general is unknown. Due to the key role that film stoichiometry, iodine deficiency, and crystallinity play on voltage losses, stability, and efficiency of PSCs, [ 94,95,98,109–111 ] we further investigate in this direction.…”

Section: Resultsmentioning

confidence: 99%

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Mitigation of Open‐Circuit Voltage Losses in Perovskite Solar Cells Processed over Micrometer‐Sized‐Textured Si Substrates

Farag

Faßl

et al. 2022

Adv Funct Materials

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The recent development of solution‐processed perovskite thin films over micrometer‐sized textured silicon bottom solar cells enables tandem solar cells with power conversion efficiencies > 30%. Next to improved light harvesting, textured silicon wafers are the industrial standard. To achieve high performance, the open‐circuit voltage losses that occur when fabricating perovskite solar cells over such textures need to be mitigated. This study provides a practical guideline to discriminate and address the voltage losses at the interfaces as well as in the bulk of solution‐processed double cation perovskite thin films using photoluminescence quantum yield measurements. Furthermore, the origin of these losses is investigated via morphological, microstructural, and compositional analysis and present possible mitigation strategies. The guideline will be beneficial for scientists working on randomly textured surfaces and provides a deeper understanding on this timely research topic.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Mitigation of Open‐Circuit Voltage Losses in Perovskite Solar Cells Processed over Micrometer‐Sized‐Textured Si Substrates

Farag

Faßl

et al. 2022

Adv Funct Materials

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“…In addition to doping of the NiO x , extensively different approaches have been adopted to passivate the NiO x ‐perovskite interface. [ 50–69 ] Which surface treatment is adopted can also vary depending on which deposition technique has been used to deposit the NiO x . Thus, potassium chloride [ 68 ] and various alkali metal‐halide salts [ 63 ] were adopted for sputtered NiO x ; and a hybrid magnesium‐organic interlayer for passivation of solution‐processed NiO x .…”

Section: Introductionmentioning

confidence: 99%

Advanced Characterization and Optimization of NiO_x:Cu‐SAM Hole‐Transporting Bi‐Layer for 23.4% Efficient Monolithic Cu(In,Ga)Se₂‐Perovskite Tandem Solar Cells

Kafedjiska

Levine

Musiienko

et al. 2023

Adv Funct Materials

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The performance of five hole‐transporting layers (HTLs) is investigated in both single‐junction perovskite and Cu(In, Ga)Se2 (CIGSe)‐perovskite tandem solar cells: nickel oxide (NiOx,), copper‐doped nickel oxide (NiOx:Cu), NiOx+SAM, NiOx:Cu+SAM, and SAM, where SAM is the [2‐(3,‐6Dimethoxy‐9H‐carbazol‐9yl)ethyl]phosphonic acid (MeO‐2PACz) self‐assembled monolayer. The performance of the devices is correlated to the charge‐carrier dynamics at the HTL/perovskite interface and the limiting factors of these HTLs are analyzed by performing time‐resolved and absolute photoluminescence ((Tr)PL), transient surface photovoltage (tr‐SPV), and X‐ray/UV photoemission spectroscopy (XPS/UPS) measurements on indium tin oxide (ITO)/HTL/perovskite and CIGSe/HTL/perovskite stacks. A high quasi‐Fermi level splitting to open‐circuit (QFLS‐Voc) deficit is detected for the NiOx‐based devices, attributed to electron trapping and poor hole extraction at the NiOx‐perovskite interface and a low carrier effective lifetime in the bulk of the perovskite. Simultaneously, doping the NiOx with 2% Cu and passivating its surface with MeO‐2PACz suppresses the electron trapping, enhances the holes extraction, reduces the non‐radiative interfacial recombination, and improves the band alignment. Due to this superior interfacial charge‐carrier dynamics, NiOx:Cu+SAM is found to be the most suitable HTL for the monolithic CIGSe‐perovskite tandem devices, enabling a power‐conversion efficiency (PCE) of 23.4%, Voc of 1.72V, and a fill factor (FF) of 71%, while the remaining four HTLs suffer from prominent Voc and FF losses.

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“…Efforts have been attempted to develop thermally stable and more transparent HTLs for mixed Pb‐Sn PSCs, such as poly[bis(4‐phenyl)(2,4,6‐trimethylphenyl)amine] (PTAA), nickel oxide (NiO x ) and self‐assembled monolayer (SAM) [20–25] . However, all‐perovskite tandem solar cells with these alternative HTLs in mixed Pb‐Sn sub‐cells have either not yet been demonstrated or exhibited far inferior photovoltaic (PV) performance than those using PEDOT : PSS [26–29] . At present, SAMs have been proved to be a promising HTL for efficient pure‐Pb PSCs [30–34] .…”

Section: Introductionmentioning

confidence: 99%

Efficient All‐Perovskite Tandem Solar Cells with Low‐Optical‐Loss Carbazolyl Interconnecting Layers

Liu,

Lin,

Wang

et al. 2023

Angewandte Chemie

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Combining wide‐bandgap (WBG) and narrow‐bandgap (NBG) perovskites with interconnecting layers (ICLs) to construct monolithic all‐perovskite tandem solar cell is an effective way to achieve high power conversion efficiency (PCE). However, optical losses from ICLs need to be further reduced to leverage the full potential of all‐perovskite tandem solar cells. Here, metal oxide nanocrystal layers anchored with carbazolyl hole‐selective‐molecules (CHs), which exhibit much lower optical loss, is employed to replace poly(3,4‐ethylenedioxythiophene) polystyrenesulfonate (PEDOT: PSS) as the hole transporting layers (HTLs) in lead‐tin (Pb‐Sn) perovskite sub‐cells and ICLs in all‐perovskite tandem solar cells. Optically transparent indium tin oxide nanocrystals (ITO NCs) layers are employed to enhance anchoring of CHs, while a mixture of two CHs is adopted to tune the surface energy‐levels of ITO NCs. The optimized mixed Pb‐Sn NBG perovskite solar cells demonstrate a high PCE of 23.2%, with a high short‐circuit current density (Jsc) of 33.5 mA cm‐2. A high PCE of 28.1% is further obtained in all‐perovskite tandem solar cells, with the highest Jsc of 16.7 mA cm‐2 to date. Encapsulated tandem solar cells maintain 90% of their reference point after 500 h of operation at the maximum power point (MPP) under 1‐Sun illumination.

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Linked Nickel Oxide/Perovskite Interface Passivation for High‐Performance Textured Monolithic Tandem Solar Cells (Adv. Energy Mater. 40/2021)

Cited by 14 publications

References 0 publications

Mitigation of Open‐Circuit Voltage Losses in Perovskite Solar Cells Processed over Micrometer‐Sized‐Textured Si Substrates

Mitigation of Open‐Circuit Voltage Losses in Perovskite Solar Cells Processed over Micrometer‐Sized‐Textured Si Substrates

Advanced Characterization and Optimization of NiO_x:Cu‐SAM Hole‐Transporting Bi‐Layer for 23.4% Efficient Monolithic Cu(In,Ga)Se₂‐Perovskite Tandem Solar Cells

Efficient All‐Perovskite Tandem Solar Cells with Low‐Optical‐Loss Carbazolyl Interconnecting Layers

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Linked Nickel Oxide/Perovskite Interface Passivation for High‐Performance Textured Monolithic Tandem Solar Cells (Adv. Energy Mater. 40/2021)

Cited by 14 publications

References 0 publications

Mitigation of Open‐Circuit Voltage Losses in Perovskite Solar Cells Processed over Micrometer‐Sized‐Textured Si Substrates

Mitigation of Open‐Circuit Voltage Losses in Perovskite Solar Cells Processed over Micrometer‐Sized‐Textured Si Substrates

Advanced Characterization and Optimization of NiOx:Cu‐SAM Hole‐Transporting Bi‐Layer for 23.4% Efficient Monolithic Cu(In,Ga)Se2‐Perovskite Tandem Solar Cells

Efficient All‐Perovskite Tandem Solar Cells with Low‐Optical‐Loss Carbazolyl Interconnecting Layers

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Advanced Characterization and Optimization of NiO_x:Cu‐SAM Hole‐Transporting Bi‐Layer for 23.4% Efficient Monolithic Cu(In,Ga)Se₂‐Perovskite Tandem Solar Cells