An Alkylated Indacenodithieno[3,2‐b]thiophene‐Based Nonfullerene Acceptor with High Crystallinity Exhibiting Single Junction Solar Cell Efficiencies Greater than 13% with Low Voltage Losses

Efficient non-fullerene organic solar cells employing sequentially deposited donor–acceptor layers

“…[31][32][33][34][35] Beginning in 2015, the PCEs of champion NFA-based single-junction OSCs have been higher than those fabricated using fullerenes, and now stands at an impressive 14%. [36][37][38][39][40][41][42][43][44][45] Following this progress, the performance of OSCs based on other types of active layer architectures, such as ternary-blend OSCs [46][47][48][49] , tandem-junction OSCs [50][51][52][53] and semitransparent OSCs [54][55][56] , have all benefited from substitution of a fullerene-based electron acceptor for a NFA.…”

Efficient Polymer Solar Cells Based on Non-fullerene Acceptors with Potential Device Lifetime Approaching 10 Years

“…11, 12 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2 0 ,3 0d 0 ]-s-indaceno[1,2-b:5,6-b 0 ]-dithiophene (ITIC) and its various derivatives are among the most popular NFAs and have demonstrated wide application in highly efficient OSCs with many polymer donors. 7,[13][14][15][16][17][18] Extensive research effort has been devoted to molecular engineering on ITIC derivatives in order to improve the power conversion efficiency (PCE). 7,[13][14][15][16][17] Synergetic molecular engineering on both donors and acceptors has been demonstrated as an effective approach for improving PCE of over 13%.…”

“…7,[13][14][15][16][17][18] Extensive research effort has been devoted to molecular engineering on ITIC derivatives in order to improve the power conversion efficiency (PCE). 7,[13][14][15][16][17] Synergetic molecular engineering on both donors and acceptors has been demonstrated as an effective approach for improving PCE of over 13%. 8,19,20 To meet the requirements of industrial commercialization, a proper balance among PCE, stability and production cost has to be considered.…”

Crucial Role of Fluorine in Fully Alkylated Ladder-Type Carbazole-Based Nonfullerene Organic Solar Cells

“…[7][8][9][10][11][12][13] Among many efficient molecular modulation strategies for photovoltaic applications, the introduction of fluorine atoms into NFA materials has been widely applied to adjust their optical absorption, energy levels and carrier mobility properties. [14][15][16][17][18][19][20][21] The success of this strategy is associated with several factors. First, the small size of fluorine coupled with its high electronegativity, means the introduction of fluorine can effectively lower the energy levels without causing undesired steric hindrance.…”