Effect of UV-Light Treatment on Efficiency of Perovskite Solar Cells (PSCs)

Kim, Sangmo; Quy, Hoang Van; Choi, Hyung Wook; Bark, Chung Wung

doi:10.3390/en13051069

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…[67] In full agreement with these previous reports, [5,47,67] we find that the solution-processed Me-4PACz surface exhibits exceptionally poor surface wettability as indicated by high contact angles summarized in Figure 4a and Table S1, Supporting Information. [68][69][70] This comes along with a low surface coverage of the perovskite thin film (as shown in Figure S17, Supporting Information) and, in turn, low fabrication yield and poor performance. We note that washing the solution-processed Me-4PACz layers does not enhance the surface wettability.…”

Section: Solving the Dilemma Of Low Fabrication Yield For Me-4pacz Htlsmentioning

confidence: 99%

Evaporated Self‐Assembled Monolayer Hole Transport Layers: Lossless Interfaces in p‐i‐n Perovskite Solar Cells

Farag

Feeney

Hossain

et al. 2023

Advanced Energy Materials

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Engineering of the interface between perovskite absorber thin films and charge transport layers has fueled the development of perovskite solar cells (PSCs) over the past decade. For p‐i‐n PSCs, the development and adoption of hole transport layers utilizing self‐assembled monolayers (SAM‐HTLs) based on carbazole functional groups with phosphonic acid anchoring groups has enabled almost lossless contacts, minimizing interfacial recombination to advance power conversion efficiency in single‐junction and tandem solar cells. However, so far these materials have been deposited exclusively via solution‐based methods. Here, for the first time, vacuum‐based evaporation of the most common carbazole‐based SAM‐HTLs (2PACz, MeO‐2PACz, and Me‐4PACz) is reported. X‐ray photoelectron spectroscopy and infrared spectroscopy demonstrate no observable chemical differences in the evaporated SAMs compared to solution‐processed counterparts. Consequently, the near lossless interfacial properties are either preserved or even slightly improved as demonstrated via photoluminescence measurements and an enhancement in open‐circuit voltage. Strikingly, applying evaporated SAM‐HTLs to complete PSCs demonstrates comparable performance to their solution‐processed counterparts. Furthermore, vacuum deposition is found to improve perovskite wetting and fabrication yield on previously non‐ideal materials (namely Me‐4PACz) and to display conformal and high‐quality coating of micrometer‐sized textured surfaces, improving the versatility of these materials without sacrificing their beneficial properties.

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Section: Solving the Dilemma Of Low Fabrication Yield For Me-4pacz Htlsmentioning

confidence: 99%

Evaporated Self‐Assembled Monolayer Hole Transport Layers: Lossless Interfaces in p‐i‐n Perovskite Solar Cells

Farag

Feeney

Hossain

et al. 2023

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…Prior to PTAA coating, the glass was subjected to ultraviolet (UV) ozone treatment for 20 min. PTAA was deposited by spin-coating 50 μL of PTAA in toluene (1.5 mg mL −1 ) at 6000 rpm for 30 s, 38 followed by thermal annealing at 100 °C for 10 min. Before depositing the perovskite layer, 50 μL of DMF was spin-coated on the PTAA layer to facilitate the spreading of the perovskite precursor.…”

Section: Methodsmentioning

confidence: 99%