TY - JOUR
T1 - Induced growth of CsPbBr3 perovskite films by incorporating metal chalcogenide quantum dots in PbBr2 films for performance enhancement of inorganic perovskite solar cells
AU - Lee, Eui Jin
AU - Kim, Dae Hwan
AU - Chang, Robert P.H.
AU - Hwang, Dae Kue
N1 - Funding Information:
This work was supported by the DGSIT R&D Program of the Ministry of Science and ICT of Korea (19-ET-01), the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the Ministry of Science and ICT, Republic of Korea (nos. 2016M1A2A2936781 and 2020R1A2C201091611).
PY - 2020/11/23
Y1 - 2020/11/23
N2 - Cesium lead bromide (CsPbBr3), an inorganic perovskite material with a large band gap energy (Eg = 2.3 eV), is a great candidate to produce stable and semitransparent perovskite solar cell (PSC) platforms owing to its complete and stable perovskite structure in humid environments. We synthesized quantum dots (QDs) composed of five atoms, copper (Cu), zinc (Zn), indium (In), sulfur (S), and selenium (Se; CZISSe QDs), and incorporated them into CsPbBr3 inorganic perovskite films. To enable the dispersion of CsPbBr3-capped CZISSe QDs in a PbBr2 solution, we used the ligand-exchange method to substitute an inorganic CsPbBr3 shell instead of the long organic capping chains. CZISSe QDs functioned as crystal nuclei seeds in the PbBr2 film and promoted the crystallization of CsPbBr3. Furthermore, they were present in the mesoporous TiO2-CsPbBr3 perovskite layer, improving the extraction and transport of electrons from the CsPbBr3 light absorption layer to the TiO2. Consequently, the power conversion efficiency of the QD-containing inorganic PSC was enhanced by 20.6% compared to that of the QD-free PSC.
AB - Cesium lead bromide (CsPbBr3), an inorganic perovskite material with a large band gap energy (Eg = 2.3 eV), is a great candidate to produce stable and semitransparent perovskite solar cell (PSC) platforms owing to its complete and stable perovskite structure in humid environments. We synthesized quantum dots (QDs) composed of five atoms, copper (Cu), zinc (Zn), indium (In), sulfur (S), and selenium (Se; CZISSe QDs), and incorporated them into CsPbBr3 inorganic perovskite films. To enable the dispersion of CsPbBr3-capped CZISSe QDs in a PbBr2 solution, we used the ligand-exchange method to substitute an inorganic CsPbBr3 shell instead of the long organic capping chains. CZISSe QDs functioned as crystal nuclei seeds in the PbBr2 film and promoted the crystallization of CsPbBr3. Furthermore, they were present in the mesoporous TiO2-CsPbBr3 perovskite layer, improving the extraction and transport of electrons from the CsPbBr3 light absorption layer to the TiO2. Consequently, the power conversion efficiency of the QD-containing inorganic PSC was enhanced by 20.6% compared to that of the QD-free PSC.
KW - CZISSe quantum dots
KW - Cesium lead bromide perovskite
KW - Charge transport
KW - Inorganic perovskite solar cells
KW - Ligand exchange
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U2 - 10.1021/acsaem.0c01152
DO - 10.1021/acsaem.0c01152
M3 - Article
AN - SCOPUS:85096142236
VL - 3
SP - 10376
EP - 10383
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
SN - 2574-0962
IS - 11
ER -