Improving the stability and performance of perovskite solar cells <i>via</i> off-the-shelf post-device ligand treatment

Zhang, Hong; Ren, Xiangling; Chen, Xiwen; Mao, Jian; Cheng, Jiaqi; Zhao, Yong; Liu, Yuhang; Milić, Jovana V.; Yin, Wan‐Jian; Grätzel, Michaël; Choy, Wallace C. H.

doi:10.1039/c8ee00580j

Cited by 197 publications

(141 citation statements)

References 54 publications

Supporting

Mentioning

132

Contrasting

Order By: Relevance

“…The light intensity dependent J–V curves are shown in Figure S22b (Supporting Information) and the detailed photovoltaic parameters are summarized in Table S5 (Supporting Information). The almost unchanged V oc indicates that the trap‐related nonradiative recombination is effectively suppressed,41,50 which agrees well with the SCLC analysis presented in Figure 1. The slight PCE improvement is due to the low recombination under weak illumination 51.…”

Section: Resultssupporting

confidence: 88%

Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications

Sun

Deng

Jiang

et al. 2020

Small

View full text Add to dashboard Cite

As the fastest developing photovoltaic device, perovskite solar cells have achieved an extraordinary power conversion efficiency (PCE) of 25.3% under AM 1.5 illumination. However, few studies have been devoted to perovskite solar cells harvesting artificial light, owing to the great challenge in the simultaneous manipulation of bandgap‐adjustable perovskite materials, corresponding matched energy band structure of carrier transport materials, and interfacial defects. Herein, through systematic morphology, composition, and energy band engineering, high‐quality Cs0.05MA0.95PbBrxI3−x perovskite as the light absorber and NbyTi1−yO2 (Nb:TiO2) as the electron transport material with an ideal energy band alignment are obtained simultaneously. The theoretical‐limit‐approaching record PCEs of 36.3% (average: 34.0 ± 1.2%) under light‐emitting diode (LED, warm white) and 33.2% under fluorescent lamp (cold white) are achieved simultaneously, as well as a PCE of 19.5% (average: 18.9 ± 0.3%) under solar illumination. An integrated energy conversion and storage system based on an artificial light response solar cell and sodium‐ion battery is established for diverse practical applications, including a portable calculator, quartz clock, and even environmental monitoring equipment. Over a week of stable operation shows its great practical potential and provides a new avenue to promote the commercialization of perovskite photovoltaic devices via integration with ingenious electronic devices.

show abstract

Section: Resultssupporting

confidence: 88%

Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications

Sun

Deng

Jiang

et al. 2020

Small

View full text Add to dashboard Cite

show abstract

“…These results indicate lower trap states of perovskite film due to the superior crystallization by introducing I 2 into PbI 2 precursor. Less trap states is believed to reduce the recombination and improve the extraction of carrier . To measure the trap‐state density in the perovskite film, we fabricated electron‐only devices (FTO/TiO 2 /CH 3 NH 3 PbI 3 /PCBM/Ag).…”

Section: Resultsmentioning

confidence: 99%

Iodine Induced PbI₂ Porous Morphology Manipulation for High‐Performance Planar Perovskite Solar Cells

et al. 2018

View full text Add to dashboard Cite

The quality of the perovskite film has a vital influence on the performance of perovskite solar cells and it is quite desirable to simultaneously manipulate the crystallization and morphology of the perovskite film. In this study, conventional PbI2 is replaced with a PbI2/I2 mixed precursor during the first step of sequential deposition, causing the formation of a PbI2 porous nanostructure. By changing the content of I2 in the precursor, the morphology of the PbI2 film as well as the resulting perovskite film can be successfully modulated. With an optimal content of I2, a high‐quality perovskite film with a pure phase and smooth surface can be achieved. As a result, the conversion efficiency of perovskite solar cells using a PbI2/I2 mixed precursor can be as high as 18.63%, compared to 16.89% for the reference device through traditional sequential deposition with a pure PbI2 precursor.

show abstract

“…However, we found that excessive additive addition causes a better crystallinity but also enables the formation of huge grain gaps, which deteriorates the resulting photovoltaic performances . To improve the quality of perovskite films, various effective post‐treatment methods have been reported such as vapor treatment, ligand‐assisted postdeposition, and vertical recrystallization …”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Guanidinium‐Based Quasi 2D Perovskite Solar Cells via a Two‐Step Post‐Treatment Process

et al. 2019

View full text Add to dashboard Cite

2D perovskites with alternating cations in the interlayer space (ACI) have raised increasing interest in the field of layered 2D perovskite solar cells (PVSCs). Herein, ACI quasi‐2D PVSCs with a chemical formula of C(NH2)3(CH3NH3)4Pb4I13 (n = 4) are fabricated by an antisolvent method assisted by a novel two‐step post‐treatment process, in which guanidinium thiocyanate (GASCN) and MACl (GA = guanidinium, MA = methylammonium) are utilized as post‐treatment reagents, sequentially. With the first‐step post‐treatment by GASCN, the grain gaps within the perovskite films are dramatically diminished, leading to increased alignment and well‐ordered crystal grains. Consequently, the power conversion efficiency (PCE) of the corresponding devices increases by more than 50% (from 8.62% to 13.13%). After the second‐step post‐treatment by MACl, the trap states in the perovskite films are passivated, and as a result the PCE of the PVSCs is further enhanced to 15.27%. This work provides the new method of two‐step post‐treatment for fabrication of high quality 2D PVSC films.

show abstract

Improving the stability and performance of perovskite solar cells via off-the-shelf post-device ligand treatment

Abstract: A simple off-the-shelf post-device ligand treatment is developed to simultaneously improve the performance and air stability of perovskite solar cells, as well as repair as-prepared ‘poor devices’ for the first time.

Cited by 197 publications

References 54 publications

Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications

Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications

Iodine Induced PbI₂ Porous Morphology Manipulation for High‐Performance Planar Perovskite Solar Cells

Highly Efficient Guanidinium‐Based Quasi 2D Perovskite Solar Cells via a Two‐Step Post‐Treatment Process

Contact Info

Product

Resources

About

Improving the stability and performance of perovskite solar cells via off-the-shelf post-device ligand treatment

Abstract: A simple off-the-shelf post-device ligand treatment is developed to simultaneously improve the performance and air stability of perovskite solar cells, as well as repair as-prepared ‘poor devices’ for the first time.

Cited by 197 publications

References 54 publications

Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications

Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications

Iodine Induced PbI2 Porous Morphology Manipulation for High‐Performance Planar Perovskite Solar Cells

Highly Efficient Guanidinium‐Based Quasi 2D Perovskite Solar Cells via a Two‐Step Post‐Treatment Process

Contact Info

Product

Resources

About

Iodine Induced PbI₂ Porous Morphology Manipulation for High‐Performance Planar Perovskite Solar Cells