TY - JOUR
T1 - Solvent engineering based on triethylenetetramine (TETA) for perovskite solar cells processed in ambient-air
AU - Timasi, N.
AU - Tafazoli, S.
AU - Nouri, E.
AU - Mohammadi, M. R.
AU - Li, Y.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - Solvent engineering as a crucial factor in determining the photovoltaic performance of perovskite solar cells has attracted much attention in recent years. Herein, we treat PbI 2 and perovskite films with isopropyl alcohol, acetone, diethyl ether and dichloromethane, as standard solvents, in a modified two-step method. Meanwhile, triethylenetetramine (TETA) is introduced as a new reagent in solvent engineering for perovskite solar cell devices. Structural, optical and photovoltaic characteristics of the TETA-treated perovskite films are compared with those of the ones treated with different solvents. A shiny, pinhole-free and full-coverage texture with sufficiently large grain sizes is obtained in the presence of TETA, suggesting an efficient solvent engineering for perovskite layers. Moreover, the results reveal that residual PbI 2 is completely removed and converted to a crystalline perovskite film. Amongst the PSC devices engineered with various solvents, the TETA-treated film exhibits a 55% increase in photoconversion efficiency compared to the control device with no solvent engineering.
AB - Solvent engineering as a crucial factor in determining the photovoltaic performance of perovskite solar cells has attracted much attention in recent years. Herein, we treat PbI 2 and perovskite films with isopropyl alcohol, acetone, diethyl ether and dichloromethane, as standard solvents, in a modified two-step method. Meanwhile, triethylenetetramine (TETA) is introduced as a new reagent in solvent engineering for perovskite solar cell devices. Structural, optical and photovoltaic characteristics of the TETA-treated perovskite films are compared with those of the ones treated with different solvents. A shiny, pinhole-free and full-coverage texture with sufficiently large grain sizes is obtained in the presence of TETA, suggesting an efficient solvent engineering for perovskite layers. Moreover, the results reveal that residual PbI 2 is completely removed and converted to a crystalline perovskite film. Amongst the PSC devices engineered with various solvents, the TETA-treated film exhibits a 55% increase in photoconversion efficiency compared to the control device with no solvent engineering.
KW - perovskite solar cells
KW - hole-transporter free
KW - fully-printable components
UR - http://www.scopus.com/inward/record.url?scp=85065886247&partnerID=8YFLogxK
U2 - 10.1039/c9pp00071b
DO - 10.1039/c9pp00071b
M3 - Article
C2 - 30843569
AN - SCOPUS:85065886247
VL - 18
SP - 1228
EP - 1234
JO - Photochemical & Photobiological Sciences
JF - Photochemical & Photobiological Sciences
SN - 1474-905X
IS - 5
ER -
