How can a hydrophobic polymer PTAA serve as a hole- transport layer for an inverted tin perovskite solar cell?

Kuan, Chun‐Hsiao; Luo, Guo-Shao; Narra, Sudhakar; Maity, Surajit; Hiramatsu, Hirotsugu; Tsai, Yi-Wei; Lin, Jhih-Min; Hou, Cheng‐Hung; Shyue, Jing‐Jong; Diau, Eric Wei‐Guang

doi:10.1016/j.cej.2022.138037

Cited by 23 publications

(24 citation statements)

References 30 publications

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“…S13). The higher PCEs could be explained by the better mixing of BCP and TSA with PTAA, because the benzene group in BCP or TSA should induce a π-π interaction with PTAA ( 34 ), facilitating carrier transfer from perovskites to PTAA. Another reason is that BCP and TSA are much less soluble in the solvents of perovskites.…”

Section: Enhancing the Performance Of Perovskite Solar Cells By Lcmsmentioning

confidence: 99%

Lead-chelating hole-transport layers for efficient and stable perovskite minimodules

Fei,

Li,

Wang

et al. 2023

Science

100

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The defective bottom interfaces of perovskites and hole-transport layers (HTLs) limit the performance of p-i-n structure perovskite solar cells. We report that the addition of lead chelation molecules into HTLs can strongly interact with lead(II) ion (Pb 2+ ), resulting in a reduced amorphous region in perovskites near HTLs and a passivated perovskite bottom surface. The minimodule with an aperture area of 26.9 square centimeters has a power conversion efficiency (PCE) of 21.8% (stabilized at 21.1%) that is certified by the National Renewable Energy Laboratory (NREL), which corresponds to a minimal small-cell efficiency of 24.6% (stabilized 24.1%) throughout the module area. Small-area cells and large-area minimodules with lead chelation molecules in HTLs had a light soaking stability of 3010 and 2130 hours, respectively, at an efficiency loss of 10% from the initial value under 1-sun illumination and open-circuit voltage conditions.

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Section: Enhancing the Performance Of Perovskite Solar Cells By Lcmsmentioning

confidence: 99%

Lead-chelating hole-transport layers for efficient and stable perovskite minimodules

Fei,

Li,

Wang

et al. 2023

Science

100

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“…Tin perovskite solar cells (TPSCs) have become some of the most promising candidates for lead-free perovskite solar cells as a next-generation photovoltaic technology. − However, the intrinsic problems of TPSCs, such as Sn 2+ /Sn 4+ oxidation, rapid crystallization, poor stability, and so on, need to be solved to promote the device performance for TPSCs. − Many approached have been reported to tackle these problems; − among them, additive engineering is a promising approach to passivate the surface defects, reduce Sn 4+ back to Sn 2+ , modulate crystallization, form a surface-protected low-dimensional perovskite, and so forth. − Tin fluoride (SnF 2 ) and ethylene diammonium diiodide (EDAI 2 ) are two of the most common additives to prevent Sn 2+ /Sn 4+ oxidation as well as to regulate the crystallization for TPSC. , In addition to these two additives, others such as cationic, anionic, and multifunctional additives have been widely considered for TPSCs. ,,− We have previously reported organic cations such as guanidinium (GA), 2-hydroxyethylammonium (HEA), and aziridinium (AZ) as A-site cations to cocrystallize with formamidinium (FA) to form cocationic tin perovskites for enhanced performance and stability for TPSCs. In the present study, a new organic cation, imidazolium (IM), was implemented to mix with FA to form a cocationic tin perovskite.…”

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confidence: 99%

Additive Engineering with Triple Cations and Bifunctional Sulfamic Acid for Tin Perovskite Solar Cells Attaining a PCE Value of 12.5% without Hysteresis

et al. 2022

Self Cite

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Imidazolium (IM) and cesium (Cs) were treated as A-site cationic additives for a triiodide tin perovskite solar cell (FASnI 3 ; FA, formamidinium) with sulfamic acid (SA) as a bifunctional additive in varied proportions. IM has a tight aromatic structure that is feasible to passivate the crystal defects and help in perovskite crystallization. Cs can stabilize the crystal structure and decrease trap state densities. TOF-SIMS measurements show the passivation effect of both IM and SA occurring on the surface of the film. The bifunctional SA additive can occupy the iodine vacancies in tin perovskites to passivate the uncoordinated Sn atoms and to passivate the surface defects effectively. Furthermore, SA has the effect of reducing Sn 4+ back to Sn 2+ via its ammonia/ acid form converted from its zwitterionic form upon irradiation, as observed from in situ XPS measurements. The hybrid device was optimized to attain a PCE value of 12.5% for the perovskite structure Cs 0.02 IM 0.1 FA 0.88 SnI 3 +1% SA with superior, long-lasting stability.

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“…Then tin perovskite layer was deposited on these SAM substrates according to a two-step method reported previously. [31,33,35] Afterwards, C 60 , BCP and silver layers were deposited on the perovskite layer step by step via thermal evaporation. Since our previous study [35] indicates that the pre-heating of the ITO substrate affects the device performance quite significantly, we therefore first checked the device performance at varied pre-heating temperatures from 100 to 500 °C; the corresponding results are shown in Figure S5 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Quinoxaline‐Based X‐Shaped Sensitizers as Self‐Assembled Monolayer for Tin Perovskite Solar cells

Afraj

Kuan

Lin

et al. 2023

Adv Funct Materials

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Four X-shaped quinoxaline-based organic dyes, PQx (1), TQx, (2), PQxD (3), and TQxD (4) (D = dye sensitizers) are developed and served as p-type selfassemble monolayer (SAM) for tin perovskite solar cells (TPSC). Thermal, optical, and electrochemical properties of these SAMs are thoroughly investigated and characterized. Tin perovskite layers are successfully deposited on these four SAM surfaces according to a two-step approach and the devices exhibit power conversion efficiency in the order of TQxD (8.3%) > TQx (8.0%) > PQxD (7.1%) > PQx (6.1%). With thiophene π-extended conjugation unit in SAM structure, TQxD (4) exhibits the highest hole extraction rates, greatest hole mobilities, and slowest charge recombination to achieve great device performance of 8.3%, which is the current best result for SAM-based TPSC ever reported. Furthermore, all devices except PQx shows great enduring stability for the performance retaining ≈90% of their original values for shelf storage over 1600 h.

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How can a hydrophobic polymer PTAA serve as a hole- transport layer for an inverted tin perovskite solar cell?

Cited by 23 publications

References 30 publications

Lead-chelating hole-transport layers for efficient and stable perovskite minimodules

Lead-chelating hole-transport layers for efficient and stable perovskite minimodules

Additive Engineering with Triple Cations and Bifunctional Sulfamic Acid for Tin Perovskite Solar Cells Attaining a PCE Value of 12.5% without Hysteresis

Quinoxaline‐Based X‐Shaped Sensitizers as Self‐Assembled Monolayer for Tin Perovskite Solar cells

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