ペロブスキート太陽電池強化のためのスピロビフローレンベースの高結合三次元共性有機フレームワーク

Chenyu Wu¹, Yamei Liu¹, Hui Liu¹

¹Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, School of Polymer Science and Engineering , Qingdao University of Science and Technology , Qingdao 266042 , China.

Journal of the American Chemical Society

|July 17, 2018

まとめ

新しい3次元共性有機フレームワーク (3D COF) は,ペロブスキート太陽電池の効率を高め,漏れを防止します. これらのスパイロビフローレンベースの3DCOFは,電力変換効率と安定性を改善します.

科学分野:

材料科学
有機化学
再生可能エネルギー

背景:

協和有機フレームワーク (COF) は,調節性特性を有する結晶性多孔ポリマーである.
ペロブスキート太陽電池 (PSC) は高い電力変換効率を提供していますが,安定性の課題に直面しています.
PSCの性能と安定性を高めるための新しい材料の開発は極めて重要です.

研究の目的:

新型スピロビフローレンベースの3DCOF (SP-3D-COF) の合成と特徴づけ
PSCにおけるドーパントとしてこれらのSP-3D-COFの適用を調査する.
PSCにおけるパフォーマンス向上のメカニズムを明らかにする.

主な方法:

イミン結合形成によるSP-3D-COFの合成
粉末X線微分と構造シミュレーションを用いた結晶分析.
SP-3D-COFでドーピングされたPSCの製造と試験
物質の相互作用を理解するための実験的および計算的研究.

主要な成果:

6倍または7倍の相互浸透性を有する高度結合SP-3D-COFを成功裏に構築した.
SP-3D-COFは永続的な多孔性と高い熱安定性を示した.
SP-3D-COFでPSCをドーピングすると,平均電力変換効率が最大18.0%向上し,漏れを防ぐことができました.
ペロブスキートとSP-3D-COFの間の光反応相互作用メカニズムが提案された.

結論:

SP-3D-COFは,PSCのパフォーマンスを高めるのに有効なドーパントです.
SP-3D-COFのユニークな相互結合と多孔性は,デバイスの効率と安定性を向上させます.
COFとペロブスキットの相互作用に関するさらなる研究は次世代の太陽電池技術につながる可能性があります.

さらに関連する動画

08:30

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

17.2K

11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

19.1K

関連する概念動画

02:18

Network Covalent Solids

16.2K

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...

Covalent Bonds

Covalent Bonds

Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...

11.4K

02:29

Relative Strengths of Conjugate Acid-Base Pairs

52.6K

Brønsted-Lowry acid-base chemistry is the transfer of protons; thus, logic suggests a relation between the relative strengths of conjugate acid-base pairs. The strength of an acid or base is quantified in its ionization constant, Ka or Kb, which represents the extent of the acid or base ionization reaction. For the conjugate acid-base pair HA / A−, the ionization equilibrium equations and ionization constant expressions are

52.6K

02:04

Covalently Linked Protein Regulators

9.6K

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....

9.6K

02:46

Covalent Bonding and Lewis Structures

61.5K

Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.