Correlating the perovskite/polymer multi-mode reactions with deep-level traps in perovskite solar cells

Zhu, Zhengjie; Mao, Kaitian; Zhang, Kai; Peng, Wei; Zhang, Jieqi; Meng, Hongguang; Cheng, Shuang; Li, Tie‐Qiang; Lin, Hongzhen; Chen, Qi; Wu, Xiaojun; Xu, Jixian

doi:10.1016/j.joule.2022.10.007

Cited by 69 publications

(49 citation statements)

References 74 publications

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“…One possible reason for the unusual photoinduced segregation profile and significant magnitude of change in the absorption is the possibility of interaction between the amine group and the perovskite. It has been previously reported that molecules containing R-NH 2 can exhibit in situ protonation by FA when deposited on the perovskite . This would however result in deprotonation of the organic cation in the perovskite, which is expected to result in increased ion migration.…”

Section: Resultsmentioning

confidence: 99%

“…It has been previously reported that molecules containing R-NH 2 can exhibit in situ protonation by FA when deposited on the perovskite. 48 This would however result in deprotonation of the organic cation in the perovskite, which is expected to result in increased ion migration. Since the amine-containing surface modifications can also affect the quality of the perovskite film grown on top of the HTL, 7,35 we also examined the perovskite film quality and obtained cross-section SEM images are shown in Figure S8.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Dual Surface Modifications of NiO_x/Perovskite Interface for Enhancement of Device Stability

Lin

Wang

Khaleed

et al. 2023

ACS Appl. Mater. Interfaces

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Various phosphonic acid based self-assembled monolayers (SAMs) have been commonly used for interface modifications in inverted perovskite solar cells. This typically results in significant enhancement of the hole extraction and consequent increase in the power conversion efficiency. However, the surface coverage and packing density of SAM molecules can vary, depending on the chosen SAM material and underlying oxide layer. In addition, different SAM molecules have diverse effects on the interfacial energy level alignment and perovskite film growth, resulting in complex relationships between surface modification, efficiency, and lifetime. Here we show that ethanolamine surface modification combined with [2-(9H-carbazol-9-yl)ethyl]phosphonic acid (2PACz) results in significant improvement in device stability compared to devices with 2PACz modification only. The significantly smaller size of ethanolamine enables it to fill any gaps in 2PACz coverage and provide improved interfacial defect passivation, while its different chemical structure enables it to provide complementary effects to 2PACz passivation. Consequently, the perovskite films are more stable under illumination (slower photoinduced segregation), and the devices exhibit significant stability enhancement. Despite similar power conversion efficiencies (PCE) between 2PACz only and combined ethanolamine-2PACz modification (PCE of champion devices ∼21.6–22.0% for rigid and ∼20.2–21.0% for flexible devices), the T 80 lifetime under simulated solar illumination in ambient is improved more than 15 times for both rigid and flexible devices.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Dual Surface Modifications of NiO_x/Perovskite Interface for Enhancement of Device Stability

Lin

Wang

Khaleed

et al. 2023

ACS Appl. Mater. Interfaces

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“…As discussed above, highly efficient TSCs prefer p-i-n structure. The main HTLs for WBG PSCs and TSCs are PTAA, NiO x and self-assembled materials (SAMs) [ 147 , 148 , 173 – 175 ], while the ETLs are fullerene and its derivatives. Table 4 summarized the device performance of WBG PSCs with different CTLs.…”

Section: Optimization For Wbg Perovskitesmentioning

confidence: 99%

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

et al. 2023

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Perovskite-based tandem solar cells have attracted increasing interest because of its great potential to surpass the Shockley–Queisser limit set for single-junction solar cells. In the tandem architectures, the wide-bandgap (WBG) perovskites act as the front absorber to offer higher open-circuit voltage (VOC) for reduced thermalization losses. Taking advantage of tunable bandgap of the perovskite materials, the WBG perovskites can be easily obtained by substituting halide iodine with bromine, and substituting organic ions FA and MA with Cs. To date, the most concerned issues for the WBG perovskite solar cells (PSCs) are huge VOC deficit and severe photo-induced phase separation. Reducing VOC loss and improving photostability of the WBG PSCs are crucial for further efficiency breakthrough. Recently, scientists have made great efforts to overcome these key issues with tremendous progresses. In this review, we first summarize the recent progress of WBG perovskites from the aspects of compositions, additives, charge transport layers, interfaces and preparation methods. The key factors affecting efficiency and stability are then carefully discussed, which would provide decent guidance to develop highly efficient and stable WBG PSCs for tandem application.

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“…Interface modifications, irrespective of the charge-transport layer and/or perovskite films, are playing important roles for improving the interfacial charge carrier dynamics. In particular, the interesting in situ chemical reactions occurring between the neutral amines and the organic cation(s) of the precursor material offer huge potential for further exploration in PSCs and other perovskite-based electronics: highly targeted chemical reactions or surface species can be implemented into the perovskite system for specific aims. ,− In the end, we expect that most of the efficiency gains in Sn-containing PSCs will come through efficient management of charge carriers at the interfaces.…”

Section: Challenges and Solutions For Tin-containing Perovskite Solar...mentioning

confidence: 99%

Prospects for Tin-Containing Halide Perovskite Photovoltaics

Smith

Snaith

et al. 2023

Precision Chemistry

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Tin-containing metal halide perovskites have enormous potential as photovoltaics, both in narrow band gap mixed tin−lead materials for all-perovskite tandems and for lead-free perovskites. The introduction of Sn(II), however, has significant effects on the solution chemistry, crystallization, defect states, and other material properties in halide perovskites. In this perspective, we summarize the main hurdles for tin-containing perovskites and highlight successful attempts made by the community to overcome them. We discuss important research directions for the development of these materials and propose some approaches to achieve a unified understanding of Sn incorporation. We particularly focus on the discussion of charge carrier dynamics and nonradiative losses at the interfaces between perovskite and charge extraction layers in p-i-n cells. We hope these insights will aid the community to accelerate the development of high-performance, stable single-junction tincontaining perovskite solar cells and all-perovskite tandems.

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Correlating the perovskite/polymer multi-mode reactions with deep-level traps in perovskite solar cells

Cited by 69 publications

References 74 publications

Dual Surface Modifications of NiO_x/Perovskite Interface for Enhancement of Device Stability

Dual Surface Modifications of NiO_x/Perovskite Interface for Enhancement of Device Stability

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

Prospects for Tin-Containing Halide Perovskite Photovoltaics

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Correlating the perovskite/polymer multi-mode reactions with deep-level traps in perovskite solar cells

Cited by 69 publications

References 74 publications

Dual Surface Modifications of NiOx/Perovskite Interface for Enhancement of Device Stability

Dual Surface Modifications of NiOx/Perovskite Interface for Enhancement of Device Stability

Recent Advances in Wide-Bandgap Organic–Inorganic Halide Perovskite Solar Cells and Tandem Application

Prospects for Tin-Containing Halide Perovskite Photovoltaics

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Product

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Dual Surface Modifications of NiO_x/Perovskite Interface for Enhancement of Device Stability

Dual Surface Modifications of NiO_x/Perovskite Interface for Enhancement of Device Stability