Efficient Circularly Polarized Luminescence and Bright White Emission from Hybrid Indium-Based Perovskites via Achiral Building Blocks

Chiral organic-inorganic hybrid perovskites (OIHPs) exhibit exceptional optical and chiral properties, demonstrating potential for 3D display, circularly polarized light-emitting diodes (CP-LEDs), and CPL switches. However, the construction of chiral OIHPs often relies on chiral building blocks, limiting chemical diversity, and possessing challenges in achieving large asymmetry factor ( g lum ) without sacrificing photoluminescence quantum yield (PLQY). Here, Chiral DMA 4 In 1- x Sb x Cl 7 (DMA = dimethylammonium, x = 0 to 1) with superior circularly polarized luminescence (CPL) are successfully constructed based on achiral building blocks DMA + and metal halides. By optimizing the Sb 3+ content, bright white emission with a high PLQY of 69.13% is achieved, as well as near-unity PLQY yellow emission and strong CPL signals with a g lum of up to +1.40 × 10 −2 , exhibiting a performance comparable to state-of-the-art chiral OIHPs. Combining optical characterizations and theoretical calculations reveal that these intriguing properties originate from the intrinsic chiral helical structures and a pair of perfect complementary color emissions in DMA 4 In 1- x Sb x Cl 7 . In addition, DMA 4 In 1- x Sb x Cl 7 exhibit excellent thermal stability and mild thermal quenching in the temperature range of 300 to 420 K. These fascinating properties suggest that DMA 4 In 1- x Sb x Cl 7 have significant applications in white light-emitting diodes (WLED), 3D displays and anti-counterfeiting.