Coordination‐Induced Defects Elimination of SnO<sub>2</sub> Nanoparticles via a Small Electrolyte Molecule for High‐Performance Inverted Organic Solar Cells

Gao, Hongyu; Wei, Xueqi; Yu, Runnan; Cao, Fong-Yi; Gong, Yongshuai; Ma, Zongwen; Cheng, Yen‐Ju; Hsu, Chain‐Shu; Tan, Zhan’ao

doi:10.1002/adom.202102031

Cited by 20 publications

(16 citation statements)

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“…As a result, the combination of surface and bulk defects (from both the interface and PVK crystals) reduces the short-circuit current (J SC ) and open-circuit voltage (V OC ), resulting in a lower PCE in SnO 2based PSCs. [30][31][32][33] Passivating surface defects in SnO 2 has been achieved by several strategies, such as metallic ion doping, [34][35][36] molecular coordination, [26,[37][38][39] ligand tailoring [40,41] and small molecule anchoring [42][43][44] on the SnO 2 layer. Among them, solutionprocessed interlayers present a fascinating approach.…”

Section: Introductionmentioning

confidence: 99%

Efficient and Stable Perovskite Solar Cells with a High Open‐Circuit Voltage Over 1.2 V Achieved by a Dual‐Side Passivation Layer

Kim

et al. 2022

Advanced Materials

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Suppressing nonradiative recombination at the interface between the organometal halide perovskite (PVK) and the charge‐transport layer (CTL) is crucial for improving the efficiency and stability of PVK‐based solar cells (PSCs). Here, a new bathocuproine (BCP)‐based nonconjugated polyelectrolyte (poly‐BCP) is synthesized and this is introduced as a “dual‐side passivation layer” between the tin oxide (SnO2) CTL and the PVK absorber. Poly‐BCP significantly suppresses both bulk and interfacial nonradiative recombination by passivating oxygen‐vacancy defects from the SnO2 side and simultaneously scavenges ionic defects from the other (PVK) side. Therefore, PSCs with poly‐BCP exhibits a high power conversion efficiency (PCE) of 24.4% and a high open‐circuit voltage of 1.21 V with a reduced voltage loss (PVK bandgap of 1.56 eV). The non‐encapsulated PSCs also show excellent long‐term stability by retaining 93% of the initial PCE after 700 h under continuous 1‐sun irradiation in nitrogen atmosphere conditions.

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Section: Introductionmentioning

confidence: 99%

Efficient and Stable Perovskite Solar Cells with a High Open‐Circuit Voltage Over 1.2 V Achieved by a Dual‐Side Passivation Layer

Kim

et al. 2022

Advanced Materials

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“…Surprisingly, different than previous work where only one or two modification sites can be offered by the interlayer, , PAA presents five possible interacting sites on the ZnO layer (1, 2, 3, 4, and 5 sites as shown in Figure a), where the four oxygen atoms from the carboxyl group and the nitrogen atom from the amine unit all obtain large binding energies from 76 to 94 kcal·mol –1 , associated with a short distance between Zn 2+ (in ZnO) and O or N (in PAA) of 2.9, 2.9, 3.3, 2.7, and 2.9 Å in 1, 2, 3, 4, and 5 sites, respectively. The above results not only suggest PAA can easily armor on the ZnO surface but also indicate that PAA might interact with ZnO through the formation of Zn–O or Zn–N chemical bonds via multiple sites. − To verify this, X-ray photoelectron spectroscopy (XPS) was employed to gain deeper insights into the chemical interaction between ZnO and PAA. ,, As shown in Figure b, peaks located at 292.5 and 295.4 eV are ascribed to the K 2p peaks of PAA, which can be clearly detected on the ZnO surface, suggesting the adhesion of PAA on the ZnO surface. In addition, we also found PAA exhibits an N 1s signal at 399.7 eV, and this signal was divided into two distinct peaks located at 397.8 and 399.4 eV in the ZnO/PAA ETL (see Figure c), suggesting the chemical environment of N has been changed.…”

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confidence: 88%

Self-Assembled Biomolecule Interlayer for Enhanced Efficiency and Stability of Inverted Organic Solar Cells

Liu

Wang

Zhou

et al. 2022

ACS Materials Lett.

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Interlayers play a vital role in achieving high efficiency and stability of organic solar cells (OSCs). Zinc oxide (ZnO) has been widely used as an electron transport layer (ETL) in inverted OSCs; however, its high structural defects and intrinsic photocatalytic nature toward nonfullerene acceptors limit its applications in OSCs. Herein, a low-cost, environmentally-friendly biomolecule, potassium aspartic acid (PAA), is introduced as the interlayer on top of the ZnO ETL. Through experimental results and theoretical calculations, we find PAA not only can tune energy alignments and passivate oxygen vacancy defects and zinc interstitial dangling bonds but also can promote the π–π stacking strength of the active layer, leading to enhanced charge collection and photovoltaic performance in both IT series (e.g., PM6:IT-4F) and Y series (e.g., PM6:BTP-4F-C5-16) OSCs. Moreover, benefiting from the reduced surface defects of ZnO, OSCs based upon the ZnO/PAA ETL exhibit superior stabilities under continuous operation as well as UV-light irradiation, leading to an improved T 80 lifetime of around 4 times compared to OSCs fabricated without the PAA interlayer. This work provides a universal solution to fabricate efficient and stable inverted OSCs.

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“…The 150-nm Ag OPV exhibited a PCE of 16.94% with a short circuit current density (J SC ) of 26.04 mA cm −2 , an open-circuit voltage (V OC ) of 0.841 V, and a fill factor (FF) of 77.34%. [51] 30nm Ag OPV exhibited a considerable PCE of 15.52% with a J SC of 24.07 mA cm −2 , V OC of 0.839 V, and FF of 76.86%. The slightly lower J SC of 30-nm Ag OPV can be attributed to the semitransparent of 30-nm Ag (AVT of 4.03%), resulting in a relatively lower PCE.…”

Section: Application Of Cf Electrodes For Colorful Opvsmentioning

confidence: 99%

High‐Performance Colorful Organic Photovoltaics with Microcavity Resonance Color Filter

Liu

Zhong

et al. 2023

Advanced Energy Materials

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Microcavity resonance is an effective technique for making promising semitransparent organic photovoltaics (ST‐OPVs) even more aesthetically attractive with high color saturation, by tailoring the visible transmittance spectrum to narrow the transmission peak. In this study, a distinctive microcavity resonance color filter (CF) structure of silver/ bismuth(III) fluoride /silver (Ag/BiF3/Ag) is integrated upon the rear transparent electrode, which simultaneously achieves high color purity and high power conversion efficiency (PCE) for colorful OPVs. By precisely regulating the thickness of the BiF3 layer, colorful OPVs with a wide color gamut and high color purity are achieved, including the colors of indigo, blue, bluish‐green, green, orange, and red, as well as compound color devices with dual or multiple transmission peaks in the visible region. A recorded PCE of 16.27% is obtained for the indigo OPV, with the Commission Internationale de l´Eclairage 1931 coordinates of (0.164 and 0.087) and a maximum transmittance of 18.7% at the transmission peak wavelength of 393 nm. Furthermore, colorful OPVs as color reflectors are systematically investigated under different light incident surfaces. The improved stability of colorful OPVs is attributed to the excellent moisture resistance of BiF3. The colorful OPVs with desired transmitted/reflected colors, and wide color gamut show great potential for future energy harvesting solutions.

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Coordination‐Induced Defects Elimination of SnO₂ Nanoparticles via a Small Electrolyte Molecule for High‐Performance Inverted Organic Solar Cells

Abstract: Figure 2. a) XPS spectra, b) Sn 3d 3/2 and Sn 3d 5/2 core level spectra, c) O 1s level spectra, and d) XRD spectra of SnO 2 and SnO 2 :PAS thin films.

Cited by 20 publications

References 63 publications

Efficient and Stable Perovskite Solar Cells with a High Open‐Circuit Voltage Over 1.2 V Achieved by a Dual‐Side Passivation Layer

Efficient and Stable Perovskite Solar Cells with a High Open‐Circuit Voltage Over 1.2 V Achieved by a Dual‐Side Passivation Layer

Self-Assembled Biomolecule Interlayer for Enhanced Efficiency and Stability of Inverted Organic Solar Cells

High‐Performance Colorful Organic Photovoltaics with Microcavity Resonance Color Filter

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Coordination‐Induced Defects Elimination of SnO2 Nanoparticles via a Small Electrolyte Molecule for High‐Performance Inverted Organic Solar Cells

Abstract: Figure 2. a) XPS spectra, b) Sn 3d 3/2 and Sn 3d 5/2 core level spectra, c) O 1s level spectra, and d) XRD spectra of SnO 2 and SnO 2 :PAS thin films.

Cited by 20 publications

References 63 publications

Efficient and Stable Perovskite Solar Cells with a High Open‐Circuit Voltage Over 1.2 V Achieved by a Dual‐Side Passivation Layer

Efficient and Stable Perovskite Solar Cells with a High Open‐Circuit Voltage Over 1.2 V Achieved by a Dual‐Side Passivation Layer

Self-Assembled Biomolecule Interlayer for Enhanced Efficiency and Stability of Inverted Organic Solar Cells

High‐Performance Colorful Organic Photovoltaics with Microcavity Resonance Color Filter

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Product

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Coordination‐Induced Defects Elimination of SnO₂ Nanoparticles via a Small Electrolyte Molecule for High‐Performance Inverted Organic Solar Cells