Amino acid salt-driven planar hybrid perovskite solar cells with enhanced humidity stability

Yun, Seong Cheol; Ma, Sunihl; Kwon, Hyeok Chan; Kim, Kyungmi; Jang, Gyumin; Yang, Hyun-Ik; Moon, Jooho

doi:10.1016/j.nanoen.2019.02.064

Cited by 89 publications

(78 citation statements)

References 47 publications

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“…To obtain dense and pinhole-free thin films, sufficient heterogeneous nucleation is needed at the ETL/perovskite interface, and the homogeneous nucleation on the pre-generated perovskite seeds must be suppressed. [35] As presented in Figure S3 (Supporting Information), grain size enlargement and orientation alignment were observed for both 3D and 2D perovskites. Occasional pinholes at the ETL/perovskite interface can support the existence of homogeneous nucleation inside the wet film.…”

Section: Resultsmentioning

confidence: 88%

Cold Antisolvent Bathing Derived Highly Efficient Large‐Area Perovskite Solar Cells

Jang

Kwon

et al. 2019

Advanced Energy Materials

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Scaling large-area solar cells is in high demand for the commercialization of perovskite solar cells (PSCs) with a high power-conversion efficiency (PCE).However, few roll-to-roll-compatible deposition methods for the formation of highly oriented uniform perovskite films are reported. Herein, a facile cold antisolvent bathing approach compatible with large-area fabrication is introduced. The wet precursor films are submerged in a cold antisolvent bath at 0 °C, and the retarded nucleation and growth kinetics allow highly oriented perovskite to be grown along the [110] and [220] directions, perpendicular to the substrate. The high degree of the preferred crystal orientation benefits the effective charge extraction and reduces the amount of inter-and intra-grain defects inside the perovskite films, improving the PCE from 16.48% (ambientbathed solar cell) to 18.50% (cold-bathed counterpart). The cold antisolvent bathing method is employed for the fabrication of large-area (8 × 10 cm 2 ) PSCs with uniform photovoltaic device parameters, thereby verifying the scale-up capability of the method.

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Section: Resultsmentioning

confidence: 88%

Cold Antisolvent Bathing Derived Highly Efficient Large‐Area Perovskite Solar Cells

Jang

Kwon

et al. 2019

Advanced Energy Materials

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“…These Nyquist plots were fitted by using the previously reported equivalent circuit model in the PSCs (Figure S5, Supporting Information). [ 44 ] The specific parameters of these fitting are listed in Table S4 (Supporting Information). R s values of all PSCs (about 7 Ω cm 2 ) are similar, which suggests that the PSCs have good contact between each layer.…”

Section: Resultsmentioning

confidence: 99%

PEDOT:PSS‐Metal Oxide Composite Electrode with Regulated Wettability and Work Function for High‐Performance Inverted Perovskite Solar Cells

Duan

Liu

Yuan

et al. 2020

Advanced Optical Materials

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Poly(3,4‐ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) can be roll‐to‐roll deposited on the substrate facilely in the electronics, but its acidity and mismatched energy level limit the performance and stability. Herein, different metal salts are incorporated into PEDOT:PSS solution to prepare PEDOT:PSS‐AxOy (metal oxide) composite hole transport layer and it is found that the performance of inverted perovskite solar cells (PSCs) can be greatly enhanced. PSC using PEDOT:PSS‐MoOx has achieved much higher power conversion efficiency (PCE) (19.64%) than that of pristine PEDOT:PSS (12.19%). Two key factors are important for the performance enhancement. First, the increased surface free energy of PEDOT:PSS‐AxOy is beneficial for the formation of large crystal size and pinhole‐free film, leading to reduced nonradiative recombination. Second, the work function of PEDOT:PSS can be tuned to match the energy level of photoactive layer with small amount incorporation, which greatly enhances the photovoltage by a factor of 1.1. Besides, the devices based on PEDOT:PSS‐AxOy exhibit improved long‐term stability. Unencapsulated PSCs with PEDOT:PSS‐MoOx retain over 90% and 80% of their initial PCEs in N2 for 45 d and in ambient air for 20 d, respectively. The modified PEDOT:PSS solutions overcome the intrinsic imperfection and can be potentially employed for large‐scale production in the electronic devices.

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“…The carboxylic and the amino groups of the four types of amino acids on the surface of M13 bacteriophage formed Lewis base coordinations to Pb 2+ . This is not surprising because amino acid in polypeptides [37][38][39][40][41] are known to passivate perovskite grain boundaries and promote a favorable crystal orientation for charge transport. The effective coordination to Pb 2+ , and the uniform and apposite dimension of the M13 bacteriophage, the single-stranded deoxyribonucleic acid (DNA) virus enabled the formation of homogeneous and large crystal grains.…”

Section: Doi: 101002/advs202000782mentioning

confidence: 99%

Denatured M13 Bacteriophage‐Templated Perovskite Solar Cells Exhibiting High Efficiency

et al. 2020

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The M13 bacteriophage, a nature-inspired environmentally friendly biomaterial, is used as a perovskite crystal growth template and a grain boundary passivator in perovskite solar cells. The amino groups and carboxyl groups of amino acids on the M13 bacteriophage surface function as Lewis bases, interacting with the perovskite materials. The M13 bacteriophage-added perovskite films show a larger grain size and reduced trap-sites compared with the reference perovskite films. In addition, the existence of the M13 bacteriophage induces light scattering effect, which enhances the light absorption particularly in the long-wavelength region around 825 nm. Both the passivation effect of the M13 bacteriophage coordinating to the perovskite defect sites and the light scattering effect intensify when the M13 virus-added perovskite precursor solution is heated at 90°C prior to the film formation. Heating the solution denatures the M13 bacteriophage by breaking their inter-and intra-molecular bondings. The denatured M13 bacteriophage-added perovskite solar cells exhibit an efficiency of 20.1% while the reference devices give an efficiency of 17.8%. The great improvement in efficiency comes from all of the three photovoltaic parameters, namely short-circuit current, open-circuit voltage, and fill factor, which correspond to the perovskite grain size, trap-site passivation, and charge transport, respectively.

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Amino acid salt-driven planar hybrid perovskite solar cells with enhanced humidity stability

Cited by 89 publications

References 47 publications

Cold Antisolvent Bathing Derived Highly Efficient Large‐Area Perovskite Solar Cells

Cold Antisolvent Bathing Derived Highly Efficient Large‐Area Perovskite Solar Cells

PEDOT:PSS‐Metal Oxide Composite Electrode with Regulated Wettability and Work Function for High‐Performance Inverted Perovskite Solar Cells

Denatured M13 Bacteriophage‐Templated Perovskite Solar Cells Exhibiting High Efficiency

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