TY - JOUR
T1 - Palladium(II) and Platinum(II) Porphyrin Donors for Organic Photovoltaics
AU - Gao, Yaxin
AU - Piradi, Venkatesh
AU - Zhu, Xunjin
AU - So, Shu Kong
N1 - Funding Information:
This work was financially supported by the Research Grants Council of Hong Kong under Grant No. GRF12200119. Y.G. would like to acknowledge the RGC of Hong Kong for the HKPFS Fellowship support. X.Z. thanks the financial support of the General Research Fund (HKBU 12304320) from the Hong Kong Research Grants Council, and Initiation Grant for Faculty Niche Research Areas (IG-FNRA) (2020/21)-RC-FNRA-IG/20-21/SCI/06 from the Research Committee of Hong Kong Baptist University.
Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/4/25
Y1 - 2022/4/25
N2 - Three new A-π-D-π-A structural porphyrin-based donors, C19-H2P, C19-PdP, and C19-PtP, are designed and synthesized, with porphyrin (D) moieties equipped with no metal, palladium (Pd), and platinum (Pt) as the core, respectively, and end-capped with electron-deficient 3-ethylrhodanine (A) via a π-bridge of phenylene ethynylene linker. C19-PdP and C19-PtP exhibit low-lying highest occupied molecular orbital levels than C19-H2P. The three porphyrin donors show highly intensified and broad absorptions at ca. 400-530 nm (Soret bands) and at ca. 550-800 nm (Q-bands) with an absorption valley at ca. 540 nm. Using PC71BM as an electron acceptor, the devices based on C19-PdP and C19-PtP donors achieve power conversion efficiencies (PCEs) of 8.09 and 7.31% under 1 Sun, respectively, whereas the C19-H2P device, that has no metal, has a very low PCE of 2.51%. Furthermore, at 300 lux LED source, the C19-PdP and C19-PtP devices deliver promising PCEs of 16.54 and 16.74%, respectively. The improved performance of C19-PdP- and C19-PtP-based devices is mainly due to more efficient charge collection, faster charge transport, more suppressed recombination behavior, and smoother surface morphology. These findings pave the way for the development of new metalloporphyrin-based donors for organic solar cells using simple structural engineering.
AB - Three new A-π-D-π-A structural porphyrin-based donors, C19-H2P, C19-PdP, and C19-PtP, are designed and synthesized, with porphyrin (D) moieties equipped with no metal, palladium (Pd), and platinum (Pt) as the core, respectively, and end-capped with electron-deficient 3-ethylrhodanine (A) via a π-bridge of phenylene ethynylene linker. C19-PdP and C19-PtP exhibit low-lying highest occupied molecular orbital levels than C19-H2P. The three porphyrin donors show highly intensified and broad absorptions at ca. 400-530 nm (Soret bands) and at ca. 550-800 nm (Q-bands) with an absorption valley at ca. 540 nm. Using PC71BM as an electron acceptor, the devices based on C19-PdP and C19-PtP donors achieve power conversion efficiencies (PCEs) of 8.09 and 7.31% under 1 Sun, respectively, whereas the C19-H2P device, that has no metal, has a very low PCE of 2.51%. Furthermore, at 300 lux LED source, the C19-PdP and C19-PtP devices deliver promising PCEs of 16.54 and 16.74%, respectively. The improved performance of C19-PdP- and C19-PtP-based devices is mainly due to more efficient charge collection, faster charge transport, more suppressed recombination behavior, and smoother surface morphology. These findings pave the way for the development of new metalloporphyrin-based donors for organic solar cells using simple structural engineering.
KW - indoor light
KW - metalloporphyrin
KW - noble metal
KW - organic solar cells
KW - palladium
KW - platinum
KW - porphyrin donor
UR - http://www.scopus.com/inward/record.url?scp=85127595530&partnerID=8YFLogxK
U2 - 10.1021/acsaem.2c00317
DO - 10.1021/acsaem.2c00317
M3 - Journal article
AN - SCOPUS:85127595530
SN - 2574-0962
VL - 5
SP - 4916
EP - 4925
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 4
ER -
