Photovoltaic　(PV)　technology　is　ready　to　become　one　of　the　main　energy　sources　of,　and　contributers　to,　carbon　neutrality　by　the　mid-21st　century.　In　2020,　a　total　of　135　GW　of　PV　modules　were　produced.　Crystalline　silicon　solar　cells　dominate　the　world＇s　PV　market　due　to　high　power　conversion　efficiency,　high　stability,　and　low　cost.　Silicon　heterojunction　(SHJ)　solar　cells　are　one　of　the　promising　technologies　for　next-generation　crystalline　silicon　solar　cells.　Compared　to　the　commercialized　homojunction　silicon　solar　cells,　SHJ　solar　cells　have　higher　power　conversion　efficiency,　lower　temperature　coefficient,　and　lower　manufacturing　temperatures.　Recently,　several　new　record　efficiencies　have　been　achieved.　To　meet　the　continued　demand　for　high-efficiency　solar　cells,　expectations　for　large-scale　mass　production　of　SHJ　solar　cells　are　rising.　To　approach　the　efficiency　limit　and　industrialization　of　SHJ　solar　cells,　serious　attempts　have　been　made,　yielding　higher　short-circuit　current,　open-circuit　voltage,　and　fill　factor.　In　this　article,　these　recent　advancements　are　reviewed,　which　reveals　the　future　roadmap　for　approaching　the　efficiency　limit.