PMID- 34405676
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210902
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 13
IP  - 34
DP  - 2021 Sep 1
TI  - Stiffening the Pb-X Framework through a pi-Conjugated Small-Molecule Cross-Linker 
      for High-Performance Inorganic CsPbI(2)Br Perovskite Solar Cells.
PG  - 40489-40501
LID - 10.1021/acsami.1c06533 [doi]
AB  - Inorganic CsPbI(2)Br perovskites have witnessed incredible advances as a 
      promising representative for translucent and tandem solar cells, but 
      unfortunately, they are still plagued by serious energy losses and undesired 
      phase instability. Herein, a new type of pi-conjugated small molecule of 
      4-guanidinobenzoic-acid-hydrochloride (4-GBACl) is demonstrated to effectively 
      cross-link the Pb-X framework of perovskites. The strong coordination between 
      4-GBACl and the [PbX(6)](4-) octahedron of perovskites effectively stiffens the 
      Pb-X framework to suppress the ion migration, thus stabilizing the perovskite 
      phase structure against light and thermal conditions. Apart from the physical 
      barrier for phase instability resulting from the hydrophobic benzene ring at 
      grain boundaries (GBs), guanidinium cations and -COOH and Cl(-) groups can 
      simultaneously afford the passivation of positively and negatively charged 
      defects at the GBs and surface, including undercoordinated halide species and 
      undercoordinated Pb(2+) ions, thereby effectively inhibiting the charge 
      trapping/recombination centers. Two-dimensional confocal-fluorescence mapping 
      images provide a visualized sight into the significantly suppressed nonradiative 
      recombination and the prolonged carrier lifetime. It is suggested that the 
      4-GBACl additive plays multiple roles in grain cross-linking to regulate 
      crystallization, distinctly reducing the trap-state density, ion migration 
      inhibition, and moisture barrier in CsPbI(2)Br films. Consequently, the 
      4-GBACl-treated device exhibits a champion power conversion efficiency (PCE) of 
      15.59% accompanied with a considerably improved V(oc) of 1.28 V and maintains 88% 
      of the initial PCE value after 1200 h aging under 20% relative humidity.
FAU - Li, Hui
AU  - Li H
AUID- ORCID: 0000-0003-0440-921X
AD  - Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, 
      Ministry of Education, School of Materials Science and Engineering, Shandong 
      University, Jinan 250061, P. R.China.
FAU - Hao, Xiaotao
AU  - Hao X
AUID- ORCID: 0000-0002-0197-6545
AD  - State Key Laboratory of Crystal Materials, School of Physics, Shandong 
      University, Jinan 250100, P. R.China.
FAU - Chang, Bohong
AU  - Chang B
AD  - Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, 
      Ministry of Education, School of Materials Science and Engineering, Shandong 
      University, Jinan 250061, P. R.China.
FAU - Li, Zihao
AU  - Li Z
AD  - Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, 
      Ministry of Education, School of Materials Science and Engineering, Shandong 
      University, Jinan 250061, P. R.China.
FAU - Wang, Lian
AU  - Wang L
AD  - Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, 
      Ministry of Education, School of Materials Science and Engineering, Shandong 
      University, Jinan 250061, P. R.China.
FAU - Pan, Lu
AU  - Pan L
AD  - Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, 
      Ministry of Education, School of Materials Science and Engineering, Shandong 
      University, Jinan 250061, P. R.China.
FAU - Chen, Xihan
AU  - Chen X
AUID- ORCID: 0000-0001-7907-2549
AD  - Department of Mechanical and Energy Engineering, Southern University of Science 
      and Technology, Shenzhen 518055, P. R.China.
FAU - Yin, Longwei
AU  - Yin L
AUID- ORCID: 0000-0003-3768-6846
AD  - Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, 
      Ministry of Education, School of Materials Science and Engineering, Shandong 
      University, Jinan 250061, P. R.China.
LA  - eng
PT  - Journal Article
DEP - 20210818
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
SB  - IM
OTO - NOTNLM
OT  - CsPbI2Br
OT  - [PbX6]4- octahedron
OT  - charge trapping
OT  - defect passivation
OT  - stability
EDAT- 2021/08/19 06:00
MHDA- 2021/08/19 06:01
CRDT- 2021/08/18 08:43
PHST- 2021/08/19 06:00 [pubmed]
PHST- 2021/08/19 06:01 [medline]
PHST- 2021/08/18 08:43 [entrez]
AID - 10.1021/acsami.1c06533 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2021 Sep 1;13(34):40489-40501. doi: 
      10.1021/acsami.1c06533. Epub 2021 Aug 18.