Damp heat–stable perovskite solar cells with tailored-dimensionality 2D/3D heterojunctions

Azmi, Randi; Ugur, Esma; Seitkhan, Akmaral; Aljamaan, Faisal; Subbiah, Anand S.; Liu, Jiang; Harrison, George T.; Nugraha, Mohamad Insan; Eswaran, Mathan Kumar; Babics, Maxime; Chen, Yuan; Xu, Fuzong; Allen, Thomas G.; Rehman, Atteq Ur; Wang, Chien‐Lung; Anthopoulos, Thomas D.; Schwingenschlögl, Udo; Bastiani, Michele De; Aydın, Erkan; Wolf, Stefaan De

doi:10.1126/science.abm5784

Cited by 482 publications

(532 citation statements)

References 38 publications

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“…Benefit from the merits of flexible structure and alterable functional groups, organic materials show stronger defect passivation effects to coordinate with the positively or negatively charged defects via Lewis acid-base or electrostatic interactions. On the other hand, organic ammonium salts can help construct a low-dimensional perovskite interlayer, which can further reduce perovskite surface defect densities and enhance environmental stability [13][14][15][16].…”

mentioning

confidence: 99%

Interface functionalization in inverted perovskite solar cells: From material perspective

Zhu

et al. 2022

Nano Res. Energy

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mentioning

confidence: 99%

Interface functionalization in inverted perovskite solar cells: From material perspective

Zhu

et al. 2022

Nano Res. Energy

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“…The demand for high-efficiency, low-cost photovoltaic systems is continually driving the development of new solar cells ahead 11 , 12 . Among various types of solar cells, PSCs have attracted a lot of interest because of their excellent advantages of long length of charge carriers’ diffusions, great absorption coefficients plus simple manufacturing techniques 13 , 14 , so that their PCE has rapidly boosted beyond 25% in few years 15 – 17 .…”

Section: Introductionmentioning

confidence: 99%

Molecular engineering of several butterfly-shaped hole transport materials containing dibenzo[b,d]thiophene core for perovskite photovoltaics

Shariatinia‬

Sarmalek

2022

Sci Rep

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Several butterfly-shaped materials composed of dibenzo[b,d]thiophene (DBT) and dibenzo-dithiophene (DBT5) cores were designed as hole transporting materials (HTMs) and their properties were studied by density functional theory (DFT) computations for usage in mesoscopic n-i-p perovskite solar cells (PSCs). To choose suitable HTMs, it was displayed that both of lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energies of molecules were located higher than those of CH3NH3PbI3 (MAPbI3) perovskite as they were able to transfer holes from the MAPbI3 toward Ag cathode. Negative solvation energy (ΔEsolvation) values for all HTMs (within the range of − 5.185 to − 18.140 kcal/mol) revealed their high solubility and stability within CH2Cl2 solvent. The DBT5-COMe demonstrated the lowest values of band gap (Eg = 3.544) and hardness (η = 1.772 eV) (the greatest chemical activity) and DBT5-CF3 displayed the biggest η = 1.953 eV (maximum stability) that were predominantly valuable for effective HTMs. All HTMs presented appropriately high LHEs from 0.8793 to 0.9406. In addition, the DBT5 and DBT5-SH depicted the lowest exciton binding energy (Eb) values of 0.881 and 0.880 eV which confirmed they could produce satisfactory results for the PSCs assembled using these materials. The DBT5-SH and DBT5-H had maximum hole mobility (μh) values of 6.031 × 10–2 and 1.140 × 10–2 which were greater than those measured for the reference DBT5 molecule (μh = 3.984 × 10–4 cm2/V/s) and about 10 and 100 times superior to the calculated and experimental μh values for well-known Spiro-OMeTAD. The DBT5-COOH illustrated the biggest open circuit voltage (VOC), fill factor (FF) and power conversion efficiency (PCE) values of 1.166 eV, 0.896 and 23.707%, respectively, establishing it could be as the best HTM candidate for high performance PSCs.

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“…[ 1 ] Since its inception in 2009, researchers have made continuous improvements in composition engineering, perovskite‐transport layer interface engineering, and solvent engineering. [ 2 , 3 , 4 ] Currently, the single‐junction PSCs have been reported to achieve a recorded PCE of 25.8%, making perovskite solar cells a disruptive type of photovoltaic technology. [ 5 , 6 ] Because of its bandgap tunability from 1.17 eV to 3.10 eV, perovskite is also an ideal choice as both wide‐bandgap top and narrow‐bandgap bottom sub‐cells in tandem solar cells (TSCs).…”

Section: Introductionmentioning

confidence: 99%

Mixed Solvents Assisted Post‐Treatment Enables High‐Efficiency Single‐Junction Perovskite and 4T Perovskite/CIGS Tandem Solar Cells

et al. 2022

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The interface between the perovskite layer and the hole transport layer (HTL) plays a vital role in hole extraction and electron blocking in perovskite solar cells (PSCs), and it is particularly susceptible to harmful defects. Surface passivation is an effective strategy for addressing the above concerns. However, because of its strong polarity, isopropyl alcohol (IPA) is used as a solvent in all of the surface treatment materials reported thus far, and it frequently damages the surface of perovskite. In this paper, a method is proposed for dissolving the passivation materials, for example, guanidine bromide (GABr), in mixed solvents (1:1) of IPA and toluene (TL), which can efficiently passivate interface and grain boundary defects by minimizing the IPA solubility of the perovskite surface. As a result, all the performance parameters Voc, Jsc, and FF are improved, and the power conversion efficiency (PCE) increased from 20.1 to 22.7%. Moreover, combining the PSCs with GABr post‐treatment in mixed solvents with copper indium gallium selenide (CIGS) solar cells, a 4‐terminal (4T) perovskite/CIGS tandem device is realized and a PCE of 25.5% is achieved. The mixed solvent passivation strategy demonstrated here, hopefully, will open new avenues for improving PSCs’ efficiency and stability.

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Damp heat–stable perovskite solar cells with tailored-dimensionality 2D/3D heterojunctions

Cited by 482 publications

References 38 publications

Interface functionalization in inverted perovskite solar cells: From material perspective

Interface functionalization in inverted perovskite solar cells: From material perspective

Molecular engineering of several butterfly-shaped hole transport materials containing dibenzo[b,d]thiophene core for perovskite photovoltaics

Mixed Solvents Assisted Post‐Treatment Enables High‐Efficiency Single‐Junction Perovskite and 4T Perovskite/CIGS Tandem Solar Cells

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