S1
Suppo ing In o ma ion:
Polyme -assis ed C ys alliza ion and De ec Passi a ion in Plana
Wide Bandgap FAPbB 3 Pe o ski e Sola Cells
Amal aj Pe e Amala has1,2*, Loheeswa an Sel adu ai1,3, Lucie Lando á2,4, Neda
Neyko a2,4 and Jakub Holo ský2,4*
1Depa men o Physics, Facul y o Science, Uni e si y o Ja na, Ja na 40000, S i Lanka
2Cen e o Ad anced Pho o ol aics, Facul y o Elec ical Enginee ing, Czech Technical Uni e si y in
P ague, Technick 2, 166 27 P ague, Czech Republic
3Depa men o Physical Science, T incomalee Campus, Eas e n Uni e si y, T incomalee 31010, S i
Lanka
4 Ins i u e o Physics, Czech Academy o Sciences, . . i., Cuk o a nick 10, 162 00 P ague, Czech
Republic
*Co esponding au ho s: amal aj@uni .j n.ac.lk; holo sky@ zu.cz
S2
Figu e S1: (a) UV–Vis abso bance spec a o FAPbB 3 ilms wi h and wi hou PMMA ea men
and (b, c) Tauc plo s used o es ima e he op ical bandgap (Eg), showing Eg ≈ 2.28 eV o bo h
samples.
Figu e S2: Ex ac ion o U bach ene gy (Eu) om PDS spec a o (a) un ea ed and (b) PMMA-
ea ed FAPbB 3 ilms, demons a ing educed ene ge ic diso de upon PMMA inco po a ion.
S3
The ca ie li e ime is ob ained by i ing he PL ansien decays wi h a bi-exponen ial decay
unc ion as ollows
𝑓(𝑡)= 𝐴1𝑒𝑥𝑝(− 𝑡
𝜏1)+ 𝐴2𝑒𝑥𝑝(− 𝑡
𝜏2)+ 𝐵
whe e A1 and A2 ep esen he ime-independen decay ampli udes, B is a cons an , and τ1 and τ2
a e he as and slow decay ime, espec i ely. The weigh ed-a e age li e ime (τa g) is calcula ed
om he i cu e pa ame e s acco ding o he ollowing equa ion.
𝜏𝑎𝑣𝑔 =𝐴1𝜏12+ 𝐴2𝜏22
𝐴1𝜏1+ 𝐴2𝜏2
Table S1. Summa y o he i and calcula ed pa ame e s o he TRPL spec a o he FAPbB 3
pe o ski e ilms p epa ed wi hou and wi h PMMA an i-sol en ea men .
Sample name
A1(%)
τ1 (ns)
A2(%)
τ2 (ns)
A e age τ (ns)
FAPbB 3
83.40
5.88
16.60
41.95
27.05
FAPbB 3-PMMA
77.40
8.30
22.60
51.07
35.78
S4
Figu e S3: Space-cha ge-limi ed cu en (SCLC) measu emen s o elec on-only de ices
ab ica ed wi h (a) un ea ed and (b) PMMA- ea ed FAPbB 3 ilms, showing ap- illed limi
ol ages (VTFL) and calcula ed ap densi ies (N ).
S5
Figu e S4: The ex e nal quan um e iciency (EQE) spec a and in eg a ed JSC o he bes
pe o ming he FAPbB 3 pe o ski e sola cells p epa ed wi hou and wi h PMMA an i-sol en
ea men .
S6
Figu e S5: S a is ical dis ibu ion box plo s o (a)Voc, (b) Jsc and (c)FF o he FAPbB 3
pe o ski e sola cells p epa ed wi hou and wi h PMMA an i-sol en ea men .
S7
Table S2: Summa y o he a e age pho o ol aic pa ame e s o he FAPbB 3 pe o ski e sola
cells p epa ed wi hou and wi h PMMA an i-sol en ea men .
Name
Voc (V)
Jsc(mA/cm2)
FF(%)
PCE(%)
FAPbB 3
1.354 ± 0.040
7.60 ± 0.21
48.1 ± 4.4
4.95 ± 0.55
FAPbB 3-PMMA
1.468 ± 0.028
7.63 ± 0.23
55.1 ± 3.1
6.16 ± 0.31
S8
Figu e S6: Cu en densi y- ol age (J-V) cu es unde e e se and o wa d scans he FAPbB 3
pe o ski e sola cells p epa ed wi hou and wi h PMMA an i-sol en ea men .
S9
Table S3: Summa y o he pho o ol aic pa ame e s o e e se and o wa d scans o he bes
pe o ming FAPbB 3 pe o ski e sola cells p epa ed wi hou and wi h PMMA an i-sol en
ea men .
Name
Voc (V)
Jsc (mA/cm2)
FF (%)
PCE(%)
H-Index (%)
FAPbB 3:Re e se
1.395
7.79
51.3
5.57
13.8 %
FAPbB 3:Fo wa d
1.302
7.59
48.6
4.80
FAPbB 3-PMMA:
Re e se
1.510
7.75
55.4
6.48
5.1 %
FAPbB 3-PMMA:
Fo wa d
1.486
7.71
53.7
6.15
