Spontaneous interface engineering for dopant-free poly(3-hexylthiophene) perovskite solar cells with efficiency over 24%

Jeong, Min Ju; Yeom, Kyung Mun; Kim, Se Jin; Jung, Eui Hyuk; Noh, Jun Hong

doi:10.1039/d0ee03312j

Cited by 173 publications

(163 citation statements)

References 57 publications

Supporting

Mentioning

156

Contrasting

Unclassified

Order By: Relevance

“…The stability of the perovskite active layer which is normally sandwiched between carrier extraction and transport layers is crucial to the fabrication of operationally stable PSCs 6 . Presently methylammonium (MA + ) cations are widely incorporated into most of high‐efficiency perovskite compositions 7–10 . However, MA + cations have been revealed to easily leave from the perovskite crystal lattices, resulting in the poor thermal stability, 11–13 light stability, 14 and moisture stability, 15 which poses a severe challenge for achieving long‐term operationally stable PSCs.…”

Section: Introductionmentioning

confidence: 99%

Interfacial defect passivation by novel phosphonium salts yields 22% efficiency perovskite solar cells: Experimental and theoretical evidence

Zhou

Liu

et al. 2021

EcoMat

View full text Add to dashboard Cite

We modified perovskite/Spiro‐OMeTAD interface by using two novel phosphonium salts containing PF6− counter anion (i.e., ClTPPPF6 and BrTPPPF6). The cation and anion in phosphonium salts possess not only ionic bonds but also coordination bonds with perovskites. The anion and cation vacancies at the surface and GBs of perovskite films can be filled by phosphonium cations and PF6− anions, respectively, resulting in reduced defect density and prolonged carrier lifetimes. The stronger chemical interaction and accordingly better defect passivation were certified for BrTPPPF6 than ClTPPPF6. As a result, the devices modified by ClTPPPF6 and BrTPPPF6 deliver a PCE of 21.73% and 22.15%, respectively, which far exceed 20.6% of the control device. The unsealed BrTPPPF6 modified device maintains 98.2% of its initial efficiency value after thermal aging of 1320 h whereas merely 84.7% for the control device. 96.4% of its original efficiency was retained for BrTPPPF6‐modified device after ambient exposure of 2016 h.

show abstract

Section: Introductionmentioning

confidence: 99%

Interfacial defect passivation by novel phosphonium salts yields 22% efficiency perovskite solar cells: Experimental and theoretical evidence

Zhou

Liu

et al. 2021

EcoMat

View full text Add to dashboard Cite

show abstract

“…However, almost all reports over 24% PCE are based on the traditional NIP sandwich structure. [ 3 − 5 ] The n ‐type electron transport layer (ETL) in this architecture is usually compact TiO 2 (c‐TiO 2 ), mesoporous TiO 2 (m‐TiO 2 ), SnO 2 , ZnO, etc. Such metal oxides require a high‐temperature sintering (higher than 150 °C), especially for TiO 2 , which needs ≈500 °C to achieve the transformation of the desired crystalline phase.…”

Section: Introductionmentioning

confidence: 99%

Heterojunction Engineering and Ideal Factor Optimization Toward Efficient MINP Perovskite Solar Cells

Wang

Huang

et al. 2021

Advanced Energy Materials

View full text Add to dashboard Cite

The pursuit of high power conversion efficiency (PCE) and cost‐effective perovskite solar cells (PSCs) has spawned many innovative device structure designs. Compared with the traditional NIP type PSCs, electron transport layer (ETL) free PSCs have attracted growing attention due to their enormous potential in large area, low‐cost flexible application. However, there is still a lack of in‐depth understanding of the energy level arrangement indium tin oxide (ITO)/perovskite interface, resulting in poor device performance. Here, a metal/insulator/n‐type perovskite/p‐type spiro‐MeOTAD (MINP) structure is proposed to elaborate on the influence of the apparent work function and contact barrier change of the metal–semiconductor (MS) and metal–insulator–semiconductor (MIS) junction on the carrier transfer and collection. Common and easily available 5‐amino‐valeric acid is inserted into the ITO/perovskite interface to form an insulating dipole layer and to ensure quasi‐ohmic contact at the front interface. Consequently, the device changes from Schottky/PN cascade heterojunction type to a single PN heterojunction device with its ideal factor decreasing from 3.35 to 2.05. Accordingly, the champion device achieves 19.37% PCE with significantly increased Voc and FF compared to the pristine device. This work provides a facile and effective method to improve the application potential of novel ETL‐free PSCs.

show abstract

“…The Ga(acac) 3 ‐devices showed excellent moisture stability for 2000 h under high relative humidity (85%) without any encapsulation. [ 168 ]…”

Section: The Perovskite/htl Interfacementioning

confidence: 99%

Recent Progress of Critical Interface Engineering for Highly Efficient and Stable Perovskite Solar Cells

Xie

Lim

et al. 2021

Advanced Energy Materials

111

View full text Add to dashboard Cite

Organic–inorganic lead halide perovskite solar cells (PSCs) have demonstrated enormous potential as a new generation of solar‐based renewable energy. Although their power conversion efficiency (PCE) has been boosted to a spectacular record value, the long‐term stability of efficient PSCs is still the dominating concern that hinders their commercialization. Notably, interface engineering has been identified as a valid strategy with extraordinary achievements for enhancing both efficiency and stability of PSCs. Herein, the latest research advances of interface engineering for various interfaces are summarized, and the basic theory and multifaceted roles of interface engineering for optimizing device properties are analyzed. As a highlight, the authors provide their insights on the deposition strategy of interlayers, application of first‐principle calculation, and challenges and solutions of interface engineering for PSCs with high efficiency and stability toward future commercialization.

show abstract

Spontaneous interface engineering for dopant-free poly(3-hexylthiophene) perovskite solar cells with efficiency over 24%

Abstract: Halide perovskite solar cells (PSCs) have recently shown a leap forward in performance by reducing the recombination loss at the interface between the perovskite and hole-transporting layers through surface treatment....

Cited by 173 publications

References 57 publications

Interfacial defect passivation by novel phosphonium salts yields 22% efficiency perovskite solar cells: Experimental and theoretical evidence

Interfacial defect passivation by novel phosphonium salts yields 22% efficiency perovskite solar cells: Experimental and theoretical evidence

Heterojunction Engineering and Ideal Factor Optimization Toward Efficient MINP Perovskite Solar Cells

Recent Progress of Critical Interface Engineering for Highly Efficient and Stable Perovskite Solar Cells

Contact Info

Product

Resources

About